Urwah said that among the Ansar who were martyred on the Day of al-Yamamah, then from Banu Sa'idah, is the name of Sayyiduna Sa'd bin Hibban (may Allah be pleased with him), who was their ally from the tribe of Baliyy.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5480