Urwah (may Allah have mercy on him) states, among the names of those of the Ansar who took part in Badr: Thabit bin Aqram bin Tha'labah bin Adi bin al-Ajlan.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1332
Urwah (may Allah have mercy on him) narrates that the Messenger of Allah (peace and blessings be upon him) sent an expedition towards Najd before the Umrah, whose commander was Thabit bin Aqram, and Thabit bin Aqram was martyred in it.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1334