佛說目連問戒律中五百輕重事經 2.171

2.171

問：「沙彌犯禁，師僧已擯。謝得更出家不？」答：「若不捨戒，故是沙彌。可懺而已。」

Question: "If a śrāmaṇera violates a prohibition and the master and saṃgha have expelled him, may he go forth again if he apologizes?" Answer: "If he did not renounce his precepts, he is still a śrāmaṇera. It is sufficient merely to repent."