Frequently available for rent or purchase. Check the "Audio Language" section for Hindi availability. Apple TV (iTunes):

: It is famous for its then-revolutionary special effects, particularly the parting of the Red Sea, and its massive $13 million production budget. Streaming Availability in India

However, I couldn't find any information on a 1956 Hindi dubbed version of the movie or a direct download link. The movie was originally released in English, and it's possible that a Hindi dubbed version might have been released later.

: The movie can be rented or bought on Apple TV and Fandango at Home . A Cinematic Landmark