One verse

Srimad Bhagavatam 10.23.8

10.23.8

दीक्षाया: पशुसंस्थाया: सौत्रामण्याश्च सत्तमा: । अन्यत्र दीक्षितस्यापि नान्नमश्नन् हि दुष्यति ॥ ८ ॥

dīkṣāyāḥ paśu-saṁsthāyāḥ sautrāmaṇyāś ca sattamāḥ anyatra dīkṣitasyāpi nānnam aśnan hi duṣyati

dīkṣāyāḥ
beginning with the initiation for a sacrifice
paśu-saṁsthāyāḥ
until sacrificing the animal
sautrāmaṇyāḥ
outside of the sacrifice known as Sautrāmaṇi
ca
and
sat-tamāḥ
O purest ones
anyatra
elsewhere
dīkṣitasya
of one who has been initiated for the sacrifice
api
even
na
not
annam
food
aśnan
eating
hi
indeed
duṣyati
creates offense

Except during the interval between the initiation of the performer of a sacrifice and the actual sacrifice of the animal, O most pure brāhmaṇas, it is not contaminating for even the initiated to partake of food, at least in sacrifices other than the Sautrāmaṇi.