Amir Khusrow, Nuh Siphir quoted in Lal, K. S. (1999). Theory and practice of Muslim state in India. New Delhi: Aditya Prakashan. Chapter 4. also quoted in Lal, K. S. (1992). The legacy of Muslim rule in India. New Delhi: Aditya Prakashan. Amir Khusrau, Nub Sipehr, Wahid Mirza ed., Calcutta, 1998, Sipehr II, pp. 89, 130-131.https://en.wikiquote.org/wiki/Hindu