Abu Dawud
Tributes, Spoils And Rulership
Book Number: 013 / Hadith Number: 2941
Narated By AbuMas'ud al-Ansari : The Prophet (pbuh) appointed me to collect sadaqah and then said: Go, AbuMas'ud, I should not find you on the Day of Judgment carrying a camel of sadaqah on your back, which rumbles, the one you have taken by unfaithful dealing in sadaqah. He said: If it is so, I will not go. He said: Then I do not force you.