“Khabu khabu anumodana” is a simple Gujarati lay phrase used among Jains. It means: “I am going to eat; please accept my anumodana.” In practice:

• When someone in the home is doing tapas (like upvās or ekāsan) and others need to eat, the one who is about to eat says “khabu khabu anumodana,” expressing respectful rejoicing in the other’s tapas and seeking their goodwill.
• Often the person observing tapas replies “khao khao, anumodana,” giving their joyful approval.

Background in Jain dharma:

• Anumodana (approval/rejoicing) is one of the three ways action is bound: kṛta (doing), kārita (getting done), and anumodana (approving). Rejoicing in another’s punya-karya (good act) is itself a punya-bhāva.
• This phrase is not a formal sutra; it is a courteous household usage rooted in that principle.
• Both Śvetāmbara and Digambara traditions accept the principle of anumodana; the Gujarati wording is just cultural usage, not sect-specific.