Leviticus 18:20

“Moreover, thou shalt not lie carnally with thy neighbour’s wife, etc.] Which is adultery, and a breach of the seventh command, (<022014>Exodus 20:14): to defile thyself with her; not only adultery is a defiling a man’s wife, as it is sometimes called, but the adulterer defiles himself: all sin is of a defiling nature, but especially this, which defiles a man both in soul and body, and brings a blot and stain upon his character, which shall not be wiped off, (<200632>Proverbs 6:32,33).”

“18:20 The Hebrew word translated defile yourself could be more literally translated to become ceremonially unclean. • Sexual intercourse with a neighbor’s wife or any married woman defined adultery in the Old Testament. Breaking this law was punishable by death (Deut 22:22). Like incest, adultery threatened the integrity and security of the home and family. In this case, it violated the covenant of marriage and divided the adulterer’s affection between his spouse and his mistress.”

“Lev 20:10; Exo 20:14; Deu 5:18, Deu 22:22, Deu 22:25; Sa2 11:3, Sa2 11:4, Sa2 11:27; Pro 6:25, Pro 6:29-33; Mal 3:5; Mat 5:27, Mat 5:28; Rom 2:22; Co1 6:9; Gal 5:19; Heb 13:4 Leviticus 18:21”