…He was firmly attached to the Mahomedan religion, and made a point of destroying all Hindoo temples. In the city of Mutra he caused musjids and baza… - Mohammed Qacim Ferichta

“This answer was communicated to the Raja of Dehli, who, resolving to oppose the invaders, sent messengers throughout Hindustan to acquaint the other Rajas that Mahmud, without provocation, was marching with a vast army to destroy Thanesar, now under his immediate protection. He observed that if a barrier was not expeditiously raised against this roaring torrent, the country Hindustan would be soon overhelmed, and every state, small and great, would be entirely subverted. It, therefore, behoved them to unite their forces at Thanesar, to avert the impending calamity.

In the year AH 427 (AD 1036)… he himself marched with an army to India, to reduce the fort of Hansy… Herein he found immense treasure, and having put the fort under the charge of a trusty officer, he marched towards the fort of Sonput. Depal Hurry, the governor of Sonput, abandoned the place, and fled into the woods; but having no time to carry off his treasure, it fell into the conqueror's hands. Musaood having ordered all the temples to be razed to the ground, and the idols to be broken proceeded in pursuit of Depal Hurry…

Before he ascended the throne, he had once a quarrel with a holy man who maintained that it was highly improper for a king to interfere with the religion of his subjects or to prevent them from bathing at places to which they had been accustomed to resort for ages. The prince ( Sikandar ) drew his sword and said "Do you maintain the propriety of Hindu religion."