Data Raja (also known as Dada Raja) ka sambandh Jain dharm ke itihaas se hai. Jain granthon ke anusar, Data Raja ne Bhagwan Parshwanath ko parna karaya tha.

Katha ke anusar, jab Bhagwan Parshwanath ne 84 din ka upvaas (chaturmas) kiya, tab Data Raja ne unhe parna (upvaas todne ka bhojan) karaya tha. Is prasang ko Jain samaj mein bahut pavitra aur mahatvapurn mana jata hai.

Yeh katha vishesh roop se Shwetambar Jain parampara mein prachlit hai.