Leviticus 18:20

20 “ ‘Do not have sexual relations with your neighbor’s wife and defile yourself with her.

Read Leviticus 18:20 Using Other Translations

Moreover thou shalt not lie carnally with thy neighbour's wife, to defile thyself with her.
And you shall not lie sexually with your neighbor's wife and so make yourself unclean with her.
“Do not defile yourself by having sexual intercourse with your neighbor’s wife.