Vyasasmriti 4.6

4.6

gṛheṣu sevanīyeṣu sarvatīrthaphalaṃ tataḥ
annadasya trayo bhāgāḥ kartā bhogena lipyate

Since the fruit of all sacred fords is found in hospitable homes, / three parts belong to the giver of food; the cook is affected by the enjoyment [of the remainder].