Proverbs 6:25
23 For the commandments are like a lamp; instruction is like a light, and rebukes of discipline are like the road leading to life 24 by keeping you from the evil woman, from the smooth tongue of the loose woman. 25 Do not lust in your heart for her beauty, and do not let her captivate you with her alluring eyes; 26 for on account of a prostitute one is brought down to a loaf of bread, but the wife of another man preys on your precious life. 27 Can a man hold fire against his chest without burning his clothes?
Matthew 5:28
26 I tell you the truth, you will never get out of there until you have paid the last penny! 27 “You have heard that it was said, ‘Do not commit adultery.’ 28 But I say to you that whoever looks at a woman to desire her has already committed adultery with her in his heart. 29 If your right eye causes you to sin, tear it out and throw it away! It is better to lose one of your members than to have your whole body thrown into hell. 30 If your right hand causes you to sin, cut it off and throw it away! It is better to lose one of your members than to have your whole body go into hell.
Notes and References
"... According to Jesus, if a man looks at another man’s wife for the purpose of coveting her, he has already committed adultery. The words chosen here (coveting somebody’s wife) go back to another provision from the Decalogue. In the Greek, the text of Exodus 20:17 and Deuteronomy 5:21 reads: “You shall not covet your neighbor’s wife”. In Matthew 5:27–28, two provisions from the Decalogue are combined. One provision is explained using the other. As a result of the term ‘to covet’, the focus shifts from the physical act to the step of desiring or lusting that precedes it. The evil is rooted in desire; adultery begins in a person’s heart, which, in the contemporary anthropology, was not primarily the seat of this person’s feelings but of thoughts or intentions. Jesus’ comment considerably tightens the prohibition of adultery. His stricter interpretation corresponds with the early-Jewish exegesis, in which the two provisions from the Decalogue were also frequently combined.10 There are also numerous parallels of the opinion expressed in Matthew 5:28 that adultery already begins with someone’s desires or intentions: see Job 31:9–12; Proverbs 6:25 (here a wife tries to seduce another man by making eyes at him); Sirach 9:8; 26:21; 41:20–21; Testament of Reuben 3:10; 4:1; 6:1; Testament of Issachar 4:1–4; Leviticus Rabbah 23:12; b. Berakhot 16a; 11QTa 59:14 ..."
Weren, Wilhelmus Johannes Cornelis Studies in Matthew’s Gospel: Literary Design, Intertextuality, and Social Setting (p. 146) Brill, 2014