'Committing Adultery' in the Bible

I, however, say to you that any one who divorces his wife, except on the ground of her unchastity, leads to her committing adultery; while any one who marries her after her divorce is guilty of adultery.

and if she herself divorces her husband and marries another man, she is committing adultery.”

and was teaching them when the Scribes and the Pharisees brought to Him a woman who had been found committing adultery. They made her stand in the centre of the court, and they put the case to Him.

they say to him, Teacher, this woman has been taken in the very act, committing adultery.

That sayest - Do not commit adultery! Art thou, committing adultery? That abhorrest sacrilege, Art thou, robbing temples?

So, if she lives with another man while her husband is still alive, she will be called an adulteress [i.e., a person who is sexually unfaithful to their mate]. But if her husband dies, she is legally free to marry another man without committing adultery.

lo, I will cast her into a couch, and those committing adultery with her into great tribulation -- if they may not repent of their works,