Only those are believers, who believe in God and His Apostle: when they are with him on a matter requiring collective action, they do not depart until they have asked for his leave; those who ask for thy leave are those who believe in God and His Apostle; so when they ask for thy leave, for some business of theirs, give leave to those of them whom thou wilt, and ask God for their forgiveness: for God is Oft-Forgiving, Most Merciful. (24:62)