'Adultery' in the Bible

Listen carefully, I will throw her on a bed of sickness, and those who commit adultery with her [I will bring] into great anguish, unless they repent of her deeds.

because His judgments are true and righteous. He has judged [convicted and pronounced sentence on] the great prostitute (idolatress) who was corrupting and ruining and poisoning the earth with her adultery (idolatry), and He has imposed the penalty for the blood of His bond-servants on her.”