Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
Dawud :: Book 19 : Hadith 2967
Narrated AbuBakr:
AbutTufayl said: Fatimah came to AbuBakr asking him for the inheritance of the Prophet (peace_be_upon_him). AbuBakr said: I heard the Apostle of Allah (peace_be_upon_him) say: If Allah, Most High, gives a Prophet some means of sustenance, that goes to his successor.