And, lo, Abraham said: "O my Sustainer! Show me how Thou givest life unto the dead!" Said He: "Hast thou, then, no faith?" (Abraham) answered: "Yea, but [let me see it] so that my heart may be set fully at rest." Said He: "Take, then, four birds and teach them to obey thee; then place them separately on every hill [around thee]; then summon them: they will come flying to thee. And know that God is almighty, wise."