At that time: (Lam. 1:7)... enemies were gloating over her undoing... And the maidservant said: ‘Is this not, just as Sarai did to her maidservant?’ It is this that is written: (Gen. 16:8)... from Sarai my mistress I am fleeing...
The blessed Holy One then said: ‘Daughter of the wicked guilty one! And yet even though Sarai expelled her, I was merciful upon her and upon her son, but you did not do so, rather, you caused [Var. bestowed] evil instead of good. I promise to remove the wicked kingdom from the world, and there shall be no joy before Me, until they are vanquished from the world – and at that time, there shall there be joy before Me.’ Thus it is written: (Prov. 11:10) And in the perishing of the wicked there is joy.