This tripartition forms the foundation of later, more complicated systems; it is found as early as the Koranic commentary by Ja'far al-Sadiq. He holds that the nafs is peculiar to the zalim (tyrant), the qalb to the muqtasid (moderate), and the rūh to the sābiq (preceding one, winner); the zālim loves God for his own sake, the muqtasid loves Him for Himself, and the sābiq annihilates his own will in God's will. Bayezid Bistami, Hakīm at-Tirmidhī, and Junayd have followed this tripartition.