Musnad Abu Ya'la al-Mawsili 240:2

'Abd al-Rahman ibn Salih Abu Muhammad al-Azdi narrated to us, Yunus ibn Bukayr narrated to us, from Yunus ibn Abi Ishaq, from his father, from al-Bara', from Zayd ibn Harithah, that he said: "O Messenger of Allah, you have established brotherhood between me and Hamzah ibn 'Abd al-Muttalib."