Answer

You can say:

“Athai ni bahu bahu anumodana.”

or

“Tapasvi ne Athai tapas ni hardik anumodana.”

Explanation

In Jain Dharma, instead of saying only “congratulations,” we usually say “Anumodana”, because we are appreciating and spiritually rejoicing in the Tapasvi’s tapas.

You can also say:

• “Aapna Athai tapas ni khub khub anumodana.”
• “Tamara Athai tapas thi amne khub prerna mali.”
• “Aapne aavu uttam tapas karva badal vandan ane anumodana.”
• “Tapasvi na charanoma vandan. Athai tapas ni khub anumodana.”

Simple English Message

“Heartfelt anumodana for your Athai tapas. Your devotion, strength, and faith are truly inspiring.”

Takeaway

For a Tapasvi, the most appropriate Jain expression is “Anumodana”, not just “congratulations,” because tapas is a spiritual achievement.