Ashtangasamgraha 42.73

42.73

kṛtvāvagāḍhaṃ śastreṇa mūrdhni kākapadaṃ tataḥ |

māṃsaṃ sarudhiraṃ tasya carma vā tatra nikṣipet ||

Then, having made a deep crow's-foot incision with a blade upon the head,
one should place upon it meat accompanied by blood, or hide, of that [animal].