The Kabul Shahis only retained Lamghan in the Kabul-Gandhara area by the time of Alp-tegin. According to Firishta, Sabuktigin had already begun raiding Lamghan under Alp-tegin. He crossed the Khyber Pass many times and raided the territory of Jayapala. He plundered the forts in the outlying provinces of the Kabul Shahi and captured many cities, acquiring huge booty. He also established Islam at many places. Jaipal in retaliation marched with a large force into the valley of Lamghan (Jalalabad) where he clashed with Sabuktigin and his son. The battle stretched on several days until a snow storm affected Jaipala's strategies, forcing him to sue for peace.