Answer

If someone asks you “Satha he?” in a Jain context, they are usually asking whether you are observing Sāthā / Sāthānu — a Jain practice of eating only a limited number of food items.

You can reply simply:

• “Haan, sāthā chhe.” — Yes, I am doing sāthā.
• “Na, sāthā nathi.” — No, I am not doing sāthā.
• “Aaje sāthā chhe.” — Today I am observing sāthā.

Explanation

In many Gujarati Jain families, “Sāthā chhe?” means: “Are you eating with restriction today?”

For example, during Paryushan, Ayambil, Ekasana, or other tapasya-related days, people may ask this to know whether you are following a food limitation.

Takeaway

A respectful simple answer is enough: “Haan, sāthā chhe” or “Na, sāthā nathi.”