Sahih Bukhari Volume 004, Book 053, Hadith Number 368.

Narated By Jubair bin Mutim : I and 'Uthman bin 'Affan went to Allah's Apostle and said, "O Allah's Apostle! You have given to Bani Al-Muttalib and left us although they and we are of the same kinship to you." Allah's Apostle said, "Bani Muttalib and Bani Hashim are one and the same." The Prophet did not give a share to Bani Abd Shams and Bani Naufai. (Ibn Ishaq said, "Abd Shams and Hashim and Al-Muttalib were maternal brothers and their mother was 'Atika bint Murra and Naufal was their paternal brother.)