When Abraham said: "My Lord, show me how You bring the dead to life." He asked: "Do you not then have belief?" Abraham replied: "Indeed I do! But so that my heart may be at peace." He said: "Take four birds and train them to yourself. Then put a part of them on each mountain and call to them; they will come rushing to you. Know that Allah is Almighty, All-Wise." (Surat al-Baqara: 260)