…In the following year (AH 913, AD 1506), the king marched against Nurwur, a strong fort in the district of Malwa, then in possession of the Hindoos.… - Mohammed Qacim Ferichta

Mahomed Ghoory, in the mean time returning from Ghizny, marched towards Kunowj, and engaged Jye-chund Ray, the Prince of Kunowj and Benares' This prince led his forces into the field, between Chundwar and Etawa, where he sustained a signal defeat from the vanguard of the Ghiznevide army, led by Kootbood-Deen Eibuk, and lost the whole of his baggage and elephants' He marched from thence to Benares, where, having broken the idols in above 1000 temples, he purified and consecrated the latter to the worship of the true God...'Mahomed Ghoory, following with the body of the army into the city of Benares, took possession of the country as far as the boundaries of Bengal, without opposition, and having destroyed all the idols, loaded four thousand camels with spoils.'

Mahmud having thus settled his affairs in India, returned in the autumn to Ghazny, where he remained during the winter. In the spring of the year A.H. 399 (A.D. 1008) he determined again to attack Anundpal, Raja of Lahore, for having lent his aid to Dawood, during the late defection in Multan. Anundpal, hearing of his intentions, sent ambassadors on all sides, inviting the assistance of the other princes of Hindustan, who now considered the expulsion of the Mahomedans from India as a sacred duty. Accordingly, the Rajas of Ujein, Gwaliar, Kalunjar, Kanauj, Delhi, and Ajmir, entered into a confederacy, and collecting their forces, advanced towards the Panjab with the greatest army that had yet taken the field. The Indians and Mahomedans arrived in sight of each other on a plain, on the confines of the province of P’eshawur, where they remained encamped forty days without coming to action. The troops of the idolaters daily increased in number. The Hindu females, on this occasion, sold their jewels, and melted down their golden ornaments (which they sent from distant parts), to furnish resources for the [p. 61] war; and the Gukkurs, and other warlike tribes joining the army, surrounded the Mahomedans, who were obliged to entrench their camp.

In 1018 CE Mahmud attacked the holy town of Mathura, the land of Lord Krishna, considered one of the richest in the northern belt, after the abject surrender of the Gurjara Pratihara ruler Rajyapala. Just to give an idea of the amount of loot that Mahmud managed to ship back to Ghazni during each of his plunders of India, this is the account of his campaign in Mathura by Ferishta:
It is said that the Sultan found in Muttra [Mathura] five great idols of pure gold, with eyes of rubies, each of which eyes was worth fifty thousand dinars. Upon another idol, he found a sapphire, weighing four hundred miskal; and the image being melted down, produced ninety eight thousand three hundred miskal of pure gold. Besides these, there were above a hundred idols of silver, which loaded a hundred camels with bullion. The Sultan having tarried here twenty days, in which time the city suffered greatly from fire, besides what it suffered from the hand of ravage and desolation, he marched against the other fortified places in these districts …