2:226Those who vow abstinence from their wives must wait for four months. But if they reconcile—God is Forgiving and Merciful.

2:234As for those among you who die and leave widows behind, their widows shall wait by themselves for four months and ten days. When they have reached their term, there is no blame on you regarding what they might honorably do with themselves. God is fully acquainted with what you do.

2:260And when Abraham said, “My Lord, show me how You give life to the dead.” He said, “Have you not believed?” He said, “Yes, but to put my heart at ease.” He said, “Take four birds, and incline them to yourself, then place a part on each hill, then call to them; and they will come rushing to you. And know that God is Powerful and Wise.”