"Ala’u ‘d-Din Khalji had 50.000 slaves. Flrozshah Tughluq came to have 1,80,000 slaves. Muhammad Tughluq sold thousands of slaves everyday at throw-away price. And so forth. Indeed, there was unprecedentedly brisk business in the slave markets in India and abroad, thanks to slave hunt under Muslim rule in India. And the slaves had perforce to embrace the religion of their masters. For instance, on the capture of Kalinjar in 1202, ‘fifty thousand kaniz- o ghulam , having suffered slavery, were rewarded with the honour of Islam.’ Muhammad Ghori is reported to have converted three to four hundred thousand Khokhars and Tirahias to Islam."