Valmiki Ramayana Ayodhya Kanda Sarga 108 Shloka 15

इह in this world, अन्येन by one person, भुक्तम् something eaten, अन्यस्य to other man's, देहम् body, गच्छति यदि if it reaches, प्रवसतः living in a distant place, श्राद्धम् shraddha, दद्यात् may offer, तत् that one, पथि on the way, अशनम् न भवेत् will it not be food?

If something eaten by one in this world can enter the body of another, then a shraddha can be performed for a person who has set out on a distant journey. Will that offering turn into food for him on his way?