'Unfaithfully' in the Bible

“If a person acts unfaithfully and sins unintentionally against the Lord’s holy things, then he shall bring his guilt offering to the Lord: a ram without defect from the flock, according to your valuation in silver by shekels, in terms of the shekel of the sanctuary, for a guilt offering.

“When a person sins and acts unfaithfully against the Lord, and deceives his companion in regard to a deposit or a security entrusted to him, or through robbery, or if he has extorted from his companion,

“Speak to the sons of Israel, ‘When a man or woman commits any of the sins of mankind, acting unfaithfully against the Lord, and that person is guilty,

But the sons of Israel acted unfaithfully in regard to the things under the ban, for Achan, the son of Carmi, the son of Zabdi, the son of Zerah, from the tribe of Judah, took some of the things under the ban, therefore the anger of the Lord burned against the sons of Israel.

Did not Achan the son of Zerah act unfaithfully in the things under the ban, and wrath fall on all the congregation of Israel? And that man did not perish alone in his iniquity.’”

Do we then hear about you that you have committed all this great evil by acting unfaithfully against our God by marrying foreign women?”

Thus I will make the land desolate, because they have acted unfaithfully,’” declares the Lord God.