'Sincerity' in the Bible

In spite of all this, Israel's sister, unfaithful Judah, has not turned back to me with any sincerity; she has only pretended to do so," says the Lord.

“Roam back and forth through the streets of Jerusalem,And look now and take note.And look in her open squaresTo see if you can find a man [as Abraham sought in Sodom],One who is just, who [has integrity and moral courage and] seeks truth (faithfulness);Then I will pardon Jerusalem—[for the sake of one uncompromisingly righteous person].