Participation in battles alongside the Holy Prophet (sa)

He was known as Khalid Bin Ajlaan. According to one tradition, he accompanied the Holy Prophet (sa) in the battles of Badr, Uhud and all the other battles.

(Al-Kamaal Fi Rafa Al-Artiyab An Al-Maotlif, Vol. 7, p. 222, taken from Maktabah Al-Shaamila)