There is no verifiable evidence or historical record to suggest that any Hindu king married his own daughter. The information provided in the question refers to a Mughal ruler, Shah Jahan, who was a Muslim and not a Hindu. Shah Jahan married his daughter Jahanara after his wife, Mumtaz, passed away. This marriage between Shah Jahan and Jahanara is not a typical practice and is considered an exception rather than a norm. It is important to differentiate between historical facts and any misconceptions or rumors that may be circulating.