A. Yusuf Ali:Translation:
Behold! Abraham said: "My Lord! Show me how
You givest life to the dead 306." He said: "Do you
not then believe?" He said: "Even! but to satisfy My
own understanding 307." He said: "Take four birds;
Tame them to turn to you; put a portion 308 of them
on every hill and call to them: They will come to you
(Flying) with speed. Then know that Allah is Exalted in
Power, Wise."

Muhammad Asad:Translation:
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; 256 . 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." 257
306 Verse 258, we saw, illustrated Allah's power over Life and Death, contrasted with man's vain boasts or imaginings. Verse 259 illustrated how Time is immaterial to Allah's workings; things; individuals and nations are subject to laws of life and death, which are under Allah's complete control, however much we may be misled by appearances. (R).
307 Abraham had complete faith in Allah's power, but he wanted, with Allah's permission, to give an explanation of that faith to his own heart and mind. Where I have translated "satisfy my own understanding," the literal translation would be "satisfy my own heart."
308 A portion of them: Juz'an. The Commentators understand this to mean that the birds were to be cut up and pieces of them were to be put on the hills. The cutting up or killing is not mentioned, but they say that it is implied by an ellipsis, as the question is how Allah gives life to the dead. (R).