'Act' in the Bible

“Thus says the whole congregation of the Lord, ‘What is this unfaithful act which you have committed against the God of Israel, turning away from following the Lord this day, by building yourselves an altar, to rebel against the Lord this day?

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.’”

“The Mighty One, God, the Lord, the Mighty One, God, the Lord! He knows, and may Israel itself know. If it was in rebellion, or if in an unfaithful act against the Lord do not save us this day!

And Phinehas the son of Eleazar the priest said to the sons of Reuben and to the sons of Gad and to the sons of Manasseh, “Today we know that the Lord is in our midst, because you have not committed this unfaithful act against the Lord; now you have delivered the sons of Israel from the hand of the Lord.”