The food that is given to guests without having been previously dedicated to the deities or the Pitris with the help of libations on the sacred fire, or which has been sullied on account of a part thereof having been eaten by a person who is wicked or of irreligious conduct, should be known as being due to Rakshasas.
आज्याहुतिं विना चैव यत्किञ्चित् परिविष्यते। दुराचारैश्च यद् भुक्तं तं भागं रक्षसां विदुः॥