"Mahmud had been greatly enraged at the conduct of the Jats of Multan and Bhatis of the Indus on account of their molesting his armies when he was returning from Somnath. He wanted to take vengeance on them for their conduct and punish them. Hence in the year 418 AH (1027 CE), he collected his armies for the twelfth time and set out towards Multan. When he reached the city, he ordered 1,400 strong boats to be built. They were fitted with three iron spikes each, strong and sharp, one at the bow and one each on the sides. They were so strong and sharp that they were capable of piercing, wrecking, and destroying whatever they struck against. Fourteen hundred boats were set afloat on the river. Every boat seated 20 well-equipped soldiers with bows, arrows, spears, and shields. When the Jats heard of Mahmud's approach, they carried their families to far off islands. They took up arms, equipped 4,000, and according to some accounts, 8,000 boats. Every boat contained many well-armed men. They set off to attack the enemy. When they came opposite the Muslim army, the Muslims shot arrows at them, the firemen threw rockets. When the Muslim boats came near the boats of the Jats, the spikes struck the Jat boats. In this way the Jat boats were either wrecked, drowned, or damaged. On the bands of the river, horsemen, foot soldiers and elephants had been placed. When any Jat appeared on the banks, he was again thrown in. The Muslim army marched on the banks of the river, till they sighted the camp of the refugee families. They were robbed. A good deal of booty was obtained. From there the Muslim army left with flying colors for Ghazni."