तीर्थवंशोपदेशः
Tīrtha-vaṃśa Upadeśa: Instruction on the Fruits of Sacred Waters
केशकीटावपतित क्षुत॑ श्वभिरवेक्षितम् रुदितं चावधूतं च त॑ भागं रक्षसां विदु:
Bhishma said: Food into which hair or insects have fallen, that has been tainted by a sneeze, that has been looked upon by dogs, and that is given with tears and contempt—such food too is regarded as the portion of the rākṣasas.
भीष्म उवाच