'Unfaithfully' in the Bible

"Nevertheless, when they confess their iniquity, the iniquity of their ancestors, and their unfaithfulness by which they acted unfaithfully against me by living life contrary to me

"Instruct the Israelis what to do if a man's wife turns astray so that she unfaithfully acts against him,

When he has had her drink the water, if she was defiled and had acted unfaithfully toward her husband, then the contaminated water that brings a curse will enter her and infect her, causing her abdomen to swell and her thigh to waste away. Then she is to be a cursed woman among her people.

Both of you acted unfaithfully against me among the Israelis at Meribah-kadesh in the desert of Zin, when you failed to uphold my holiness among the Israelis.

So Saul died for his transgressions; that is, he acted unfaithfully to the LORD by transgressing the message from the LORD (which he did not keep), by consulting a medium for advice,

They'll forget their shame and all of their unfaithfulness by which they behaved so unfaithfully toward me. They will live on their land in confidence, not in fear.