Rashi on Exodus 4:7/רש"י על שמות ד׳:ז׳

1ויוצאה מחיקו והנה שבה כבשרו AND HE BROUGHT IT OUT OF HIS BOSOM AND, BEHOLD, IT HAD RETURNED AS HIS OTHER FLESH — From this we may infer that the measure of Divine good comes more quickly than the measure of the punishment He inflicts, for in the former case it does not say מחיקו after the word ויוצאה. (Shabbat 97a; Exodus Rabbah 3:13).