Sahih Muslim
The Book of Faith (Kitab Al-Iman)
Book Number: 001 / Hadith Number: 278
Sa'd reported: The Messenger of Allah (may peace be upon him) bestowed upon a group of persons (booty) and I was sitting with them. The remaining part of the hadith is the same as mentioned (above) with the additionI stood up and went to the Messenger of Allah (may peace be upon him) and whispered to him: Why did you omit such and such a man?