Urwah (bin al-Zubayr), naming those of the Ansar who attended Aqabah, then from Banu Mazin bin al-Najjar: Qays bin Abi Sa'sa'ah (may Allah be pleased with him), who also took part in Badr; and the name of Abu Sa'sa'ah was Amr bin Zayd bin Awf bin Mabdhul.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 15966