"During the revision of their scriptures, Hindus inserted the names of Muhammad (PBUH) as Kalki Avatar, Narashansa, Muhammad and Mamha Rishi in Hindu scriptures to please the Muslim rulers during the Islamic rule. According to Sultan Mubin, a professor of Sanskrit at Shibli College, these are fabrications and later additions by Hindus. Hindus included these in Muslim scriptures to please the Muslim rulers, such as the Kalki Purana and Bhavishya Purana, which contain many prophecies on Islamic matters. The reasoning behind this is that most of the Hindu scriptures were translated into Arabic in the Baitul Hikmah during the reign of Caliph Mamun bin Al Rashid, but no writer of that time mentioned anything about these prophecies in any of their books. For example, he mentions the Arabic translation of Al-Biruni's Bharatattva ("Tahqiq Ma Lil Hind Min Qaqulat Mayqulat Fi Aliaql Aw Marzula") and two other Hindu scriptures, neither of which mentions any of these prophecies."