Ṣaḥīḥ al-Bukhārī & Ṣaḥīḥ Muslim

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "One of the prophets (peace be upon them) set out on a military expedition.

He said to his people: 'Let not anyone accompany me who has married a woman and wishes to consummate his marriage with her but has not yet done so, or one who has built a house but has not yet erected its roof, or one who has bought sheep or pregnant she-camels and is waiting for their offspring.' Then he marched on and approached a village at the time of the afternoon prayer or close to that, so he said to the sun: 'You are commanded and so am I.

O Allah, hold it back (from setting) for us,' and it was held back until Allah granted him victory. He gathered the spoils of war, and the fire came down to devour them but it did not devour them. He said: 'Some of you misappropriated the spoils of war, so one man from each tribe should give me his pledge of allegiance.' They all did so and the hand of one man stuck to his hand, so he said: 'Your tribe is guilty of misappropriation of the spoils of war.

Let all the members of your tribe give their pledge of allegiance to me.' They did so and the hands of two or three men stuck to his hand. He said: 'You have taken something from the spoils of war illegally.' So they brought an amount of gold equal in size to the head of a cow. They placed it among the spoils so the fire approached and devoured them.

The spoils of war were not made lawful for any people before us, then Allah made the spoils of war lawful for us when He saw our weakness and helplessness, so He made them lawful for us."