The name “Mahashti Rushidatta” does not match a standard, well-attested Jain scriptural figure I could verify. On JainKnowledge, Rishidatta is described as not a standard, widely accepted canonical name with a specific previous-birth story in core Jain scriptures. ( jainknowledge.com)

If you meant a different Jain character or if the spelling is slightly different, send the exact name, and I can give the correct Jain story.