'Unfaithfulness' in the Bible

but have walked in the way of the kings of Israel and have enticed Judah and the inhabitants of Jerusalem to be unfaithful like the unfaithfulness of the house of Ahab, and have also murdered your brothers of the house of your father who [were] better than you,

Moreover, all the utensils which King Ahaz had discarded during his reign in his unfaithfulness, we have prepared and consecrated; and behold, they are before the altar of the Lord.”

His prayer and how God granted his request, and all his sin and unfaithfulness and the sites where he built high places and set up Asherah poles and carved images before he humbled himself, they are written in the Records of Hozai.

All the leaders of the priests and the people likewise increased in unfaithfulness according to all the detestable things of the nations. And they polluted the house of Yahweh that he had consecrated in Jerusalem.