Agni Purana 168.14

168.14

prāśya mūtrapurīṣāṇi dvijaścāndrāyaṇaṃ caret /
śuṣkāṇi jagdhvā māṃsāni(2) pretānnaṃ karakāṇi ca //

a jackal, a monkey, or a crow, a twice-born should perform a cāndrāyaṇa penance; / likewise having eaten dried meat, food during mourning, or hail-stones;