Musnad Abu Ya'la al-Mawsili 109:50

Narrated to us 'Abd al-Ghaffar ibn 'Abd Allah, narrated to us 'Ali ibn Mushir, from Mujalid, from al-Sha'bi, from Jabir ibn 'Abd Allah, who said: We were with the Prophet, may Allah bless him and grant him peace, when Sa'd ibn Abi Waqqas approached. The Messenger of Allah, may Allah bless him and grant him peace, said: "This is my maternal uncle."