1 And the LORD spake unto Moses, saying, 2 Again, thou shalt say to the children of Israel, Whosoever he be of the children of Israel, or of the strangers that sojourn in Israel, that giveth any of his seed unto Molech; he shall surely be put to death: the people of the land shall stone him with stones. 3 And I will set my face against that man, and will cut him off from among his people; because he hath given of his seed unto Molech, to defile my sanctuary, and to profane my holy name. 4 And if the people of the land do any ways hide their eyes from the man, when he giveth of his seed unto Molech, and kill him not: 5 Then I will set my face against that man, and against his family, and will cut him off, and all that go a whoring after him, to commit whoredom with Molech, from among their people. 6 And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people. 7 Sanctify yourselves therefore, and be ye holy: for I am the LORD your God. 8 And ye shall keep my statutes, and do them: I am the LORD which sanctify you. 9 For every one that curseth his father or his mother shall be surely put to death: he hath cursed his father or his mother; his blood shall be upon him. 10 And the man that committeth adultery with another man's wife, even he that committeth adultery with his neighbour's wife, the adulterer and the adulteress shall surely be put to death. 11 And the man that lieth with his father's wife hath uncovered his father's nakedness: both of them shall surely be put to death; their blood shall be upon them. 12 And if a man lie with his daughter in law, both of them shall surely be put to death: they have wrought confusion; their blood shall be upon them. 13 If a man also lie with mankind, as he lieth with a woman, both of them have committed an abomination: they shall surely be put to death; their blood shall be upon them. 14 And if a man take a wife and her mother, it is wickedness: they shall be burnt with fire, both he and they; that there be no wickedness among you. 15 And if a man lie with a beast, he shall surely be put to death: and ye shall slay the beast. 16 And if a woman approach unto any beast, and lie down thereto, thou shalt kill the woman, and the beast: they shall surely be put to death; their blood shall be upon them. 17 And if a man shall take his sister, his father's daughter, or his mother's daughter, and see her nakedness, and she see his nakedness; it is a wicked thing; and they shall be cut off in the sight of their people: he hath uncovered his sister's nakedness; he shall bear his iniquity. 18 And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath discovered her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people. 19 And thou shalt not uncover the nakedness of thy mother's sister, nor of thy father's sister: for he uncovereth his near kin: they shall bear their iniquity. 20 And if a man shall lie with his uncle's wife, he hath uncovered his uncle's nakedness: they shall bear their sin; they shall die childless. 21 And if a man shall take his brother's wife, it is an unclean thing: he hath uncovered his brother's nakedness; they shall be childless. 22 Ye shall therefore keep all my statutes, and all my judgments, and do them: that the land, whither I bring you to dwell therein, spue you not out. 23 And ye shall not walk in the manners of the nation, which I cast out before you: for they committed all these things, and therefore I abhorred them. 24 But I have said unto you, Ye shall inherit their land, and I will give it unto you to possess it, a land that floweth with milk and honey: I am the LORD your God, which have separated you from other people. 25 Ye shall therefore put difference between clean beasts and unclean, and between unclean fowls and clean: and ye shall not make your souls abominable by beast, or by fowl, or by any manner of living thing that creepeth on the ground, which I have separated from you as unclean. 26 And ye shall be holy unto me: for I the LORD am holy, and have severed you from other people, that ye should be mine. 27 A man also or woman that hath a familiar spirit, or that is a wizard, shall surely be put to death: they shall stone them with stones: their blood shall be upon them.
[AD 65] 1 Peter on Leviticus 20:7
Wherefore gird up the loins of your mind, be sober, and hope to the end for the grace that is to be brought unto you at the revelation of Jesus Christ; As obedient children, not fashioning yourselves according to the former lusts in your ignorance: But as he which hath called you is holy, so be ye holy in all manner of conversation; Because it is written, Be ye holy; for I am holy. [Leviticus 20:7] And if ye call on the Father, who without respect of persons judgeth according to every man's work, pass the time of your sojourning here in fear: Forasmuch as ye know that ye were not redeemed with corruptible things, as silver and gold, from your vain conversation received by tradition from your fathers; But with the precious blood of Christ, as of a lamb without blemish and without spot: Who verily was foreordained before the foundation of the world, but was manifest in these last times for you, Who by him do believe in God, that raised him up from the dead, and gave him glory; that your faith and hope might be in God. Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently: Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever. For all flesh is as grass, and all the glory of man as the flower of grass. The grass withereth, and the flower thereof falleth away: But the word of the Lord endureth for ever. And this is the word which by the gospel is preached unto you.
[AD 253] Origen of Alexandria on Leviticus 20:9
But when we wish to examine the very letter of the words as given by Matthew, “He that speaks evil of father or mother, let him die the death,” consider whether it was taken from the place where it was written, “Whoso strikes his father or mother, let him die the death; and he that speaks evil of father or mother, let him die the death.” For such are the exact words taken from the law with regard to the two commandments; but Matthew has quoted them in part and in an abridged form, and not in the very words.

[AD 397] Ambrose of Milan on Leviticus 20:10
A woman accused of adultery was brought by the scribes and Pharisees to the Lord Jesus. But the woman was presented with guile, so that if Jesus should absolve her, he would appear to break the law. But if Jesus should condemn her, he would deviate from the purpose for which he came, since he came to forgive the sins of all. Earlier he said, “I do not judge anyone.” But presenting her, they said, “We found this woman openly committing adultery. Now it is written in the law of Moses that every adulteress is to be stoned. But what do you have to say about her?”

[AD 1781] Richard Challoner on Leviticus 20:15
The beast also ye shall kill: The killing of the beast was for the greater horror of the crime, and to prevent the remembrance of such abomination.