Muhammad bin Ishaq said: Among those of the Ansar who took part in Badr, from Banu al-Khazraj, then from Banu al-Najjar, was Abu Muhammad al-Ansari, whose name was Mas'ud bin Aws bin Asram bin Zayd bin Tha'labah bin Ghanm bin Malik bin al-Najjar.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17917