Sanskrit Punyajanam Mantra: "Jayaaya jayabhadraya haryaśvaaya namaha Gatigaccha mama sarva dāridrya dāhane"
I think you're looking for the "Punyajanam" mantra in Tamil, which is a sacred Hindu ritual. Here's some information: punyajanam mantra in tamil free
Unfortunately, I couldn't find a direct translation of the Punyajanam mantra in Tamil. However, I can provide you with the Sanskrit mantra and its Tamil equivalent or similar mantra: punyajanam mantra in tamil free
Tamil Equivalent/ Similar Mantra: "ஜயாய ஜயபத்ரய ஹர்யசுவாய நமஹ கதிகச்ச மம சர்வ தாரித்ர்ய தாஹனே" punyajanam mantra in tamil free