And when you were encamped on the nearside and they (the unbelievers) on the farther side, with the caravan below, had you made an appointment with them, you would have surely failed to keep it; but Allah sought to accomplish what He had ordained, so that by clear evidence, he who was destined to perish might perish, and he who was destined to live might live. Surely, Allah is Hearing, Knowing.