Could you please clarify what you mean by “athi”?

In Jain context, you may mean one of these:

• Atithi — a guest, especially related to Atithi Samvibhag or offering food respectfully.
• Athi / Ārti — a devotional ritual performed before Jinendra Bhagwan.
• Atthai — a Jain tapasya of fasting for eight days.

Please tell me which one you mean, and I will guide you accordingly.