Abandoning the siege, the Muslim army retreated so hastily towards the south that it was claimed they covered a distance in one day that equalled three days of normal travel.[10][11][12] On the second day, after the Arabs crossed the river Wadi al-Subuh, the Türgesh army caught up with them, and attacked a secondary camp pitched by Abdallah ibn Abi Abdallah separately from the main Arab force. The Arabs and their Sogdian allies suffered heavy casualties—the brother of the ruler of Samarkand, Ghurak, being among the slain—but managed to repel the attack.[10][13]