1 Hear, O Israel: Thou art to pass over Jordan this day, to go in to possess nations greater and mightier than thyself, cities great and fenced up to heaven, 2 A people great and tall, the children of the Anakims, whom thou knowest, and of whom thou hast heard say, Who can stand before the children of Anak! 3 Understand therefore this day, that the LORD thy God is he which goeth over before thee; as a consuming fire he shall destroy them, and he shall bring them down before thy face: so shalt thou drive them out, and destroy them quickly, as the LORD hath said unto thee. 4 Speak not thou in thine heart, after that the LORD thy God hath cast them out from before thee, saying, For my righteousness the LORD hath brought me in to possess this land: but for the wickedness of these nations the LORD doth drive them out from before thee. 5 Not for thy righteousness, or for the uprightness of thine heart, dost thou go to possess their land: but for the wickedness of these nations the LORD thy God doth drive them out from before thee, and that he may perform the word which the LORD sware unto thy fathers, Abraham, Isaac, and Jacob. 6 Understand therefore, that the LORD thy God giveth thee not this good land to possess it for thy righteousness; for thou art a stiffnecked people. 7 Remember, and forget not, how thou provokedst the LORD thy God to wrath in the wilderness: from the day that thou didst depart out of the land of Egypt, until ye came unto this place, ye have been rebellious against the LORD. 8 Also in Horeb ye provoked the LORD to wrath, so that the LORD was angry with you to have destroyed you. 9 When I was gone up into the mount to receive the tables of stone, even the tables of the covenant which the LORD made with you, then I abode in the mount forty days and forty nights, I neither did eat bread nor drink water: 10 And the LORD delivered unto me two tables of stone written with the finger of God; and on them was written according to all the words, which the LORD spake with you in the mount out of the midst of the fire in the day of the assembly. 11 And it came to pass at the end of forty days and forty nights, that the LORD gave me the two tables of stone, even the tables of the covenant. 12 And the LORD said unto me, Arise, get thee down quickly from hence; for thy people which thou hast brought forth out of Egypt have corrupted themselves; they are quickly turned aside out of the way which I commanded them; they have made them a molten image. 13 Furthermore the LORD spake unto me, saying, I have seen this people, and, behold, it is a stiffnecked people: 14 Let me alone, that I may destroy them, and blot out their name from under heaven: and I will make of thee a nation mightier and greater than they. 15 So I turned and came down from the mount, and the mount burned with fire: and the two tables of the covenant were in my two hands. 16 And I looked, and, behold, ye had sinned against the LORD your God, and had made you a molten calf: ye had turned aside quickly out of the way which the LORD had commanded you. 17 And I took the two tables, and cast them out of my two hands, and brake them before your eyes. 18 And I fell down before the LORD, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which ye sinned, in doing wickedly in the sight of the LORD, to provoke him to anger. 19 For I was afraid of the anger and hot displeasure, wherewith the LORD was wroth against you to destroy you. But the LORD hearkened unto me at that time also. 20 And the LORD was very angry with Aaron to have destroyed him: and I prayed for Aaron also the same time. 21 And I took your sin, the calf which ye had made, and burnt it with fire, and stamped it, and ground it very small, even until it was as small as dust: and I cast the dust thereof into the brook that descended out of the mount. 22 And at Taberah, and at Massah, and at Kibroth-hattaavah, ye provoked the LORD to wrath. 23 Likewise when the LORD sent you from Kadesh-barnea, saying, Go up and possess the land which I have given you; then ye rebelled against the commandment of the LORD your God, and ye believed him not, nor hearkened to his voice. 24 Ye have been rebellious against the LORD from the day that I knew you. 25 Thus I fell down before the LORD forty days and forty nights, as I fell down at the first; because the LORD had said he would destroy you. 26 I prayed therefore unto the LORD, and said, O Lord GOD, destroy not thy people and thine inheritance, which thou hast redeemed through thy greatness, which thou hast brought forth out of Egypt with a mighty hand. 27 Remember thy servants, Abraham, Isaac, and Jacob; look not unto the stubbornness of this people, nor to their wickedness, nor to their sin: 28 Lest the land whence thou broughtest us out say, Because the LORD was not able to bring them into the land which he promised them, and because he hated them, he hath brought them out to slay them in the wilderness. 29 Yet they are thy people and thine inheritance, which thou broughtest out by thy mighty power and by thy stretched out arm.
[AD 435] John Cassian on Deuteronomy 9:4
I ask, what could be said more clearly against that pernicious opinion and presumption of ours, by which we want to attribute everything that we do to our free will and to our own effort? “Do not say in your heart, when the Lord your God has destroyed them in your sight: Because of my righteousness the Lord has led me in to possess this land.” Did he not express himself clearly to those whose souls’ eyes are open and whose ears hear? Namely, when you have enjoyed a notable success in warring against the carnal vices and you see that you have been freed from their filthiness and from this world’s way of life, you should not be puffed up with the success of the struggle and the victory and ascribe this to your own strength and wisdom, believing that you were able to obtain victory over evil spirits and carnal vices through your own efforts and application and free will. There is no doubt that you would never have been able to prevail over these if the Lord’s help had not fortified and protected you.

[AD 253] Origen of Alexandria on Deuteronomy 9:9
Every form of nourishment is called “bread” in the Scriptures. This is clear from what is written concerning Moses: for forty days he neither ate “bread” nor drank water. The word that nourishes is multidimensional and varied. Not everyone can receive the solid and strong nourishment of God’s teachings. Therefore, wishing to give an athlete’s nourishment suitable to the more perfect, [Christ] says, “The bread that I will give is my flesh, which I will give for the life of the world.”

[AD 430] Augustine of Hippo on Deuteronomy 9:9
This is why Moses fasted for forty days, and Elijah, and the Mediator himself, our Lord Jesus Christ: because in this time-bound state of ours restraint from bodily attractions and allurements is very necessary. The people also spent forty years wandering in the desert, and forty days of rain produced the flood. The Lord spent forty days after his resurrection with his disciples, to convince them of the reality of his risen body. This suggests that in this life, in which we are in exile away from the Lord, the number forty stands, as I have just said, for our need to celebrate the memorial of the Lord’s body, which we do in the church until he comes.

[AD 465] Maximus of Turin on Deuteronomy 9:9
Fasting these forty days and nights, holy Moses too merited to speak with God, to stand and stay with him and to receive the precepts of the law from his hand. For although this human condition prevented him from seeing God, yet the grace of his fasting drew him into close contact with the Divinity. For to fast frequently is a portion of God’s virtues in ourselves, since God himself always fasts. He is more familiar, intimate and friendly with the person in whom he sees more of his works, as Scripture says, “And Moses spoke with God face to face like one speaking with his friend.”

[AD 386] Cyril of Jerusalem on Deuteronomy 9:10
Moses anticipates the name of the ecclesia once again when he says of the tablets: “And on them were inscribed all the words that the Lord spoke to you on the mountain from the midst of the fire on the day of the assembly.” It is as if he might have said more plainly: “you were called and gathered together.”

[AD 69] Hebrews on Deuteronomy 9:19
Wherefore lift up the hands which hang down, and the feeble knees; And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed. Follow peace with all men, and holiness, without which no man shall see the Lord: Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled; Lest there be any fornicator, or profane person, as Esau, who for one morsel of meat sold his birthright. For ye know how that afterward, when he would have inherited the blessing, he was rejected: for he found no place of repentance, though he sought it carefully with tears. For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest, And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more: (For they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart: And so terrible was the sight, that Moses said, I exceedingly fear and quake) [Deuteronomy 9:19] But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect, And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel. See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape, if we turn away from him that speaketh from heaven: Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven. And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain. Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear: For our God is a consuming fire.
[AD 386] Cyril of Jerusalem on Deuteronomy 9:20
It was not the people alone that sinned but also Aaron, the high priest. For Moses says, “And the wrath of the Lord was upon Aaron”; “and I prayed for him,” he says, “and God forgave him.” Now Moses made supplication on behalf of the high priest who sinned and prevailed upon the Lord by his importunity. If so, will not Jesus, his only-begotten Son, imploring God in our behalf, more so prevail? If he did not prevent Aaron, because of his falling away, from acceding to the high priesthood, can it be that he will prevent you, coming from paganism, from attaining salvation?