פירוש על סנהדרין 202:20

Crushed in the building - of the Egyptians, who put him into the building in the place of a brick as is explained in the aggadah. Moshe said to the Holy One 'You have done evil to this people! Now if they don't have bricks they place the children of Israel into the building!' The Holy One replied to him, 'They are wiping out the thorns, because it is revealed before Me that if these children lived they would be completely wicked. If you want, make a test and remove one.' Moshe went and removed Micah.