Vaishnava Dharmashastra 51.17

51.17

bhrūṇaghnāvekṣitam udakyāsaṃspṛṣṭaṃ patatriṇāvalīḍhaṃ śunā saṃspṛṣṭaṃ gavāghrātaṃ ca ||

Or (food) which has been looked at by the killer of an embryo (of a Brâhmana), or which has been touched by a woman in her courses, or nibbled by a bird, or touched by a dog, or smelt at by a cow;