Targum zu Bereschit 18:21

I will now appear, and see whether, as the cry of a damsel torn away, which ascendeth before Me, they have made completion of their sins; (or, whether they have made an end of their sins;) and if they have wrought repentance, shall they not be as (if) innocent before Me? and as if not knowing, I will not punish.

Now will I appear and see, according as the cry of the people of Sedom and Amorah hath ascended before Me, whether they have made a complete end. It may be, that some among these sinners do not know that their works of evil are manifest before Me. And if they seek to work repentance, behold, they shall be considered before Me as if those works had not been known.