佛說目連問戒律中五百輕重事 1.100

1.100

問：「夏坐中忘不受七日，一出行，得坐不？」答：「憶即悔，得。一坐中不得過三悔，過三悔不得歲。」

Question: "If during the summer retreat one forgets and does not receive the seven days' [leave] and travels out once, does one obtain the retreat?" Answer: "If one repents as soon as one remembers, one obtains it. In a single retreat, one must not exceed three repentances. If one exceeds three repentances, one does not obtain the retreat year."