'Faithless Israel' in the Bible

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].

And the Lord said to me, “Faithless Israel has proved herself less guilty than treacherous Judah [a land of renegades].

Go and proclaim these words toward the north [where the ten tribes have been taken as captives] and say,‘Return, faithless Israel,’ says the Lord;‘I will not look on you in anger.For I am gracious and merciful,’ says the Lord;‘I will not be angry forever.