Even during the fifteen years of Alptigin's reign Subuktigin is represented by Firishta in an untranslated passage to have made frequent attacks upon… - Sabuktigin

When Jaipál had marched to a great distance and thought that the demand upon him had relaxed, his evil disposition his evil disposition prompted him to break his engagements, and his folly made him beget enemity, insomuch as he imprisoned those who accompanied him on the part of the Amír, in reprisal for those of his relations the Amír had taken as hostages.

The Amír marched out towards Lamghan, which is a city celebrated for its great strength and abounding in wealth. He conquered it and set fire to the places in its vicinity which were inhabited by infidels, and demolishing the idol-temples, he established Islam in them. He marched and captured other cities and killed the polluted wretches, destroying the idolatrous and gratifying the Musulmans. After wounding and killing beyond all measure, his hands and those of his friends became cold in counting the value of the plundered property. On the completion of his conquest he returned and promulgated accounts of the victories obtained for Islam, and every one, great and small, concurred in rejoicing over this result and thanking Allah.

After this with kingly energy and determination, he girded up his loins for a war of religion, and invaded Hindustan, and carried away many prisoners of war and other plunder; and in every country, which he conquered, he founded mosques, and he endeavoured to ruin and desolate the territories of Raja Jaipal who, at that time, was the ruler of Hindustan.