Jeremiah 3:6-8

Moreover, the LORD said to me in the days of Josiah the king [of Judah], “Have you seen what that faithless Israel has done—how she went up on every high hill and under every green tree, and there she was a prostitute? I thought, ‘After she has done all these things she will return to Me’; but she did not return, and her treacherous (faithless) sister Judah saw it. And I saw [that even though Judah knew] that for all the acts of adultery (idolatry) of faithless Israel, I [the LORD] had sent her away and given her a certificate of divorce, yet her treacherous sister Judah was not afraid; but she went and was a prostitute also [following after idols].