Jeremiah 3:6

3:6 When Josiah was king of Judah, the Lord said to me, “Jeremiah, you have no doubt seen what wayward Israel has done. You have seen how she went up to every high hill and under every green tree to give herself like a prostitute to other gods.

Jeremiah 3:8

3:8 She also saw that I gave wayward Israel her divorce papers and sent her away because of her adulterous worship of other gods. Even after her unfaithful sister Judah had seen this, she still was not afraid, and she too went and gave herself like a prostitute to other gods.