Food which is mixed with hair or in which there are worms, or which has been spoiled with spittle or saliva or which has been looked at by a dog or into which teardrops have fallen or which has been trodden upon, should be known as forming the part of Rakshasas.
केशकीटावपतितं क्षुतं श्वभिरवेक्षितम्। रुदितं चावधूतं च तं भागं रक्षसां विदुः॥