"The Messenger of Allah said, when the Verse: 'And warn your tribe (O Muhammad) of near kindred.' was revealed: 'O Quraish! Buy your souls from your Lord; I cannot avail you anything before Allah. O Banu 'Abdul-Muttalib! I cannot avail you anything before Allah. O 'Abbas bin 'Abdul-Muttalib! I cannot avail you anything before Allah. O Safiyyah, paternal aunt of the Messenger of Allah! I cannot avail you anything before Allah. O Fatimah bint Muhammad! Ask me for whatever you want, I cannot avail you anything before Allah.'"
Sunan an-Nasa'i Book 30, Hadith 36