Then Allah sent a crow digging up the earth so that he might show him how he should cover the dead body of his brother. He said: Woe me! do I lack the strength that I should be like this crow and cover the dead body of my brother? So he became of those who regret.

Which He made to prevail against them for seven nights and eight days unremittingly, so that you might have seen the people therein prostrate as if they were the trunks of hollow palms.