In the Old Testament, all sexual sin was forbidden by the Mosaic Law and Jewish custom. However, the Hebrew word translated “fornication” in the Old Testament was also in the context of idolatry, also called spiritual whoredom.
Sa Lumang Tipan, ang lahat na kasalanang sekswal ay ipinagbabawal ng Kautusan ni Moises at ng kulturang Hudyo. Gayunman, ang salitang Hebreo na isinalin na pakikiapid sa salitang Tagalog ay ginagamit din sa konteksto ng espiritwal na pakikiapid.