四分律刪繁補闕行事鈔 2.227

2.227

Under the Vinaya, there is no transgression if: one perceives food as non-food; one does not accept it without the residual-food rite being performed; it is non-food and the rite is not performed; one is ill and does not perform the rite; it is the leftovers of an ill person and one does not perform the rite; or if the residual-food rite has already been performed—in all these cases, there is no transgression.