Sahih Muslim Book 19, Hadith Number 4342.

Chapter : Regarding the right of the fighter to the belongings of the one killed by him in the fight.

Auf b. Malik has narrated that a man from the Himyar tribe killed an enemy and wanted to take the booty. Khalid b. Walid, who was the commander over them, forbade, him. ‘Auf b Malik (the narrator) came to the Messenger of Allah (may peace be upon him) and informed him (to this effect). The latter asked Khalid: What prevented you from giving the booty to him? Khalid said: I thought it was too much. He (the Holy Prophet) said: Hand it over to him. Now when Khalid by Auf, the latter pulled him by his cloak and said (by way of chafing him): Hasn’t the same thing happened what I reported to you from the Messenger of Allah (may peace he upon him)? When the Messenger of Allah (may peace be upon him) heard it, he was angry (and said): Khalid, don’t give him, Khalid, don’t give him. Are you going to desert the commanders appointed by roe? Your similitude and theirs is like a person who took camels and sheep for grazing. He grazed them and when it was time for them to have a drink, he brought them to a pool. So they drank from it, drinking away its clear water and leaving the turbid water below So the clear water (i.e. the best reward) is for you and the turbid water (i.e. blame) is for them.