佛說目連問戒律中五百輕重事經 2.81

2.81

問：「比丘食不足，得囑未具戒者不？」答：「得。唯除婆羅門。」

Question: "If a bhikṣu does not have enough food, may he make a request to one who is not fully ordained?" Answer: "He may, with the sole exception of brāhmaṇas."