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1 And David spake unto the LORD the words of this song in the day that the LORD had delivered him out of the hand of all his enemies, and out of the hand of Saul: 2 And he said, The LORD is my rock, and my fortress, and my deliverer; 3 The God of my rock; in him will I trust: he is my shield, and the horn of my salvation, my high tower, and my refuge, my saviour; thou savest me from violence. 4 I will call on the LORD, who is worthy to be praised: so shall I be saved from mine enemies. 5 When the waves of death compassed me, the floods of ungodly men made me afraid; 6 The sorrows of hell compassed me about; the snares of death prevented me; 7 In my distress I called upon the LORD, and cried to my God: and he did hear my voice out of his temple, and my cry did enter into his ears. 8 Then the earth shook and trembled; the foundations of heaven moved and shook, because he was wroth. 9 There went up a smoke out of his nostrils, and fire out of his mouth devoured: coals were kindled by it. 10 He bowed the heavens also, and came down; and darkness was under his feet. 11 And he rode upon a cherub, and did fly: and he was seen upon the wings of the wind. 12 And he made darkness pavilions round about him, dark waters, and thick clouds of the skies. 13 Through the brightness before him were coals of fire kindled. 14 The LORD thundered from heaven, and the most High uttered his voice. 15 And he sent out arrows, and scattered them; lightning, and discomfited them. 16 And the channels of the sea appeared, the foundations of the world were discovered, at the rebuking of the LORD, at the blast of the breath of his nostrils. 17 He sent from above, he took me; he drew me out of many waters; 18 He delivered me from my strong enemy, and from them that hated me: for they were too strong for me. 19 They prevented me in the day of my calamity: but the LORD was my stay. 20 He brought me forth also into a large place: he delivered me, because he delighted in me. 21 The LORD rewarded me according to my righteousness: according to the cleanness of my hands hath he recompensed me. 22 For I have kept the ways of the LORD, and have not wickedly departed from my God. 23 For all his judgments were before me: and as for his statutes, I did not depart from them. 24 I was also upright before him, and have kept myself from mine iniquity. 25 Therefore the LORD hath recompensed me according to my righteousness; according to my cleanness in his eye sight. 26 With the merciful thou wilt shew thyself merciful, and with the upright man thou wilt shew thyself upright. 27 With the pure thou wilt shew thyself pure; and with the froward thou wilt shew thyself unsavoury. 28 And the afflicted people thou wilt save: but thine eyes are upon the haughty, that thou mayest bring them down. 29 For thou art my lamp, O LORD: and the LORD will lighten my darkness. 30 For by thee I have run through a troop: by my God have I leaped over a wall. 31 As for God, his way is perfect; the word of the LORD is tried: he is a buckler to all them that trust in him. 32 For who is God, save the LORD? and who is a rock, save our God? 33 God is my strength and power: and he maketh my way perfect. 34 He maketh my feet like hinds' feet: and setteth me upon my high places. 35 He teacheth my hands to war; so that a bow of steel is broken by mine arms. 36 Thou hast also given me the shield of thy salvation: and thy gentleness hath made me great. 37 Thou hast enlarged my steps under me; so that my feet did not slip. 38 I have pursued mine enemies, and destroyed them; and turned not again until I had consumed them. 39 And I have consumed them, and wounded them, that they could not arise: yea, they are fallen under my feet. 40 For thou hast girded me with strength to battle: them that rose up against me hast thou subdued under me. 41 Thou hast also given me the necks of mine enemies, that I might destroy them that hate me. 42 They looked, but there was none to save; even unto the LORD, but he answered them not. 43 Then did I beat them as small as the dust of the earth, I did stamp them as the mire of the street, and did spread them abroad. 44 Thou also hast delivered me from the strivings of my people, thou hast kept me to be head of the heathen: a people which I knew not shall serve me. 45 Strangers shall submit themselves unto me: as soon as they hear, they shall be obedient unto me. 46 Strangers shall fade away, and they shall be afraid out of their close places. 47 The LORD liveth; and blessed be my rock; and exalted be the God of the rock of my salvation. 48 It is God that avengeth me, and that bringeth down the people under me, 49 And that bringeth me forth from mine enemies: thou also hast lifted me up on high above them that rose up against me: thou hast delivered me from the violent man. 50 Therefore I will give thanks unto thee, O LORD, among the heathen, and I will sing praises unto thy name. 51 He is the tower of salvation for his king: and sheweth mercy to his anointed, unto David, and to his seed for evermore.
[AD 253] Origen of Alexandria on 2 Samuel 22:1-2
The fifth song is in Second Samuel, when “David spoke to the Lord the words of this song on the day when the Lord delivered him from the hand of all his enemies and from the hand of Saul.” He said, “The Lord is my rock, and my fortress, and my deliverer; my God will be my protector.” If, then, you prove able to examine who are the enemies David defeats and overthrows in First and Second Samuel and how he was made worthy of deserving the Lord’s help and of being delivered from enemies of this kind, then you will be able to sing this fifth song yourself.

[AD 69] Hebrews on 2 Samuel 22:3
For unto the angels hath he not put in subjection the world to come, whereof we speak. But one in a certain place testified, saying, What is man, that thou art mindful of him? or the son of man, that thou visitest him? Thou madest him a little lower than the angels; thou crownedst him with glory and honour, and didst set him over the works of thy hands: Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing that is not put under him. But now we see not yet all things put under him. But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man. For it became him, for whom are all things, and by whom are all things, in bringing many sons unto glory, to make the captain of their salvation perfect through sufferings. For both he that sanctifieth and they who are sanctified are all of one: for which cause he is not ashamed to call them brethren, Saying, I will declare thy name unto my brethren, in the midst of the church will I sing praise unto thee. And again, I will put my trust in him. And again, Behold I and the children which God hath given me. [2 Samuel 22:3] Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil; And deliver them who through fear of death were all their lifetime subject to bondage. For verily he took not on him the nature of angels; but he took on him the seed of Abraham. Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people. For in that he himself hath suffered being tempted, he is able to succour them that are tempted.
[AD 220] Tertullian on 2 Samuel 22:44-45
Therefore as we have shown above that the coming cessation of the old law and of the carnal circumcision was declared, so, too, the observance of the new law and the spiritual circumcision has shone out into the voluntary obediences of peace. For “a people,” he says, “whom I did not know has served me; in obedience of the ear it has obeyed me.” Prophets made the announcement. But what is the people which was ignorant of God, but ours, who in days bygone did not know God? And who, in the hearing of the ear, paid attention to him, but we, who, forsaking idols, have been converted to God?

[AD 253] Origen of Alexandria on 2 Samuel 22:44-45
“Did Jesus come into the world for this purpose, that we [the Jews] should not believe him?” To which we immediately answer that he did not come with the object of producing unbelief among the Jews; but knowing beforehand that such would be the result, he foretold it and made use of their unbelief for the calling of the Gentiles. For through their sin salvation came to the Gentiles, respecting whom the Christ who speaks in the prophecies says, “A people whom I did not know became subject to me: they were obedient to the hearing of my ear”; and, “I was found by those who did not seek me; I became manifest to those who did not inquire after me.”

[AD 430] Augustine of Hippo on 2 Samuel 22:47-51
But, as we have said elsewhere on occasion, these heretics refuse to take the blame for what they do to us and they lay the blame on us for what they do to themselves. Who of us would wish them to lose anything, much less that they be lost themselves? If the house of David could win peace in no other way than through the death of Absalom, David’s son, in the war which he was carrying on against his father—although the latter had instructed his followers with great care to keep him safe and sound as far as it was possible for them to do so, that he might repent and receive pardon from his father’s love—what was left for him but to weep over his son’s loss and find comfort for his grief in the peace thus gained for his kingdom? In the same manner, then, our Catholic mother acts when others who are not her sons make war on her—because it is a fact that this little branch in Africa has been broken off from the great tree which embraces the whole world in the spreading of its branches—and although she is in labor with them in charity, that they may return to the root without which they cannot have true life, still, if she rescues so many others by losing some, especially when these fall by self-destruction, not by the fortune of war as Absalom did, she solaces the grief of her maternal heart and heals it by the deliverance of such numbers of people.

[AD 56] Romans on 2 Samuel 22:50
Wherefore receive ye one another, as Christ also received us to the glory of God. Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers: And that the Gentiles might glorify God for his mercy; as it is written, For this cause I will confess to thee among the Gentiles, and sing unto thy name. [2 Samuel 22:50] And again he saith, Rejoice, ye Gentiles, with his people. And again, Praise the Lord, all ye Gentiles; and laud him, all ye people. And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust. Now the God of hope fill you with all joy and peace in believing, that ye may abound in hope, through the power of the Holy Ghost.