Kabbalah zu Bereschit 15:16

And if you claim that we learned that there is no joy before the Holy One, blessed be He, when He passes His judgment on the sinners, come and behold: when judgment is delivered on the wicked, there is joy and exultation before Him, because they are removed from this world. But, when is there joy? When the time that He has waited for them (to repent) is over, and they have not returned to Him from sinning. But if judgment is delivered on them before their time has come, and the measure of their sins has not yet been completed, it is, as it is written: "the iniquity of the Emorite is not yet full" (Gen. 15:16) (i.e. they can still repent); thus, there is no joy. And there is grief before Him because of their destruction.