 He was ordered by his suzerain Nuh b. Mansur to attack the rebel Fa'iq, but was defeated by him.The Farighunids developed marriage alliances with the Ghaznavids; Abu'l Haret's daughter had married Mahmud, while Mahmud's sister had married Abu'l Haret's son Abu'l-Nasr Muhammad.Abu'l Haret assisted Sebük Tigin's forces at Herat against Fa'iq and the Simjurids, a battle in which the Ghaznavids and Farighunids were victorious.