Sahih Bukhari Volume 005, Book 059, Hadith Number 525.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 59. Military Expeditions Led by the Prophet (PBUH) (Al-Maghaazi)
Narated By 'Abdullah bin Mughaffal : While we were besieging Khaibar, a person threw a leather container containing some fat and I ran to take it. Suddenly I looked behind, and behold! The Prophet was there. So I felt shy (to take it then).