Kutbn-d din built the Jami Masjid at De1hi, and “adorned it with the stones and gold obtained from the temples which had been demolished by elephants… - Qutb-ud-din Aibak

About this time they wrote to the heavenly throne, that the Rai who had fled from Dehli had raised an army of idolatrous, turbulent, and rebellious tribes, the vapour of pride and conquest havingentered his thoughtless brain." Kutbu-d din pursued him, " and when the wretch was taken, his head was severed from his body and sent to Dehli, which had been his residence and capital." Kutbu-d din then himself returned to Dehli, and sent " written accounts of his capture of forts and strongholds, and his victories and holy wars" to Ghazna, to which capital he was invited to receive thanks in person from Muizzu-d din Sam Ghori.

In the year A.D. 1202, when Qulb-ud-Din captured Kalinjar, after the temples had been convened into mosques, and the very name of idolatry was annihilated, fifty thousand men came under the collar of slavery and the plain became black as pitch with Hindus.

In 1195 when Raja Bhim was attacked by Aibak 20,000 slaves were captured, and 50,000 at Kalinjar in 1202. “The temples were converted into mosques,” writes Hasan Nizami, “and the voices of the summoners to prayer ascended to the highest heavens, and the very name of idolatry was annihilated.”... Farishtah specifically mentions that during the capture of Kalinjar “fifty thousand kaniz va ghulam, having suffered slavery, were rewarded with the honour of Islam.” Thus enslavement resulted in conversion and conversion in accelerated growth of Muslim population.