佛說目連問戒律中五百輕重事經 1.100

1.100

問：「夏中坐忘，不受七日法一出行，得坐不？」答：「憶即悔得。一坐中不過二三悔，過二三悔不得歲。」

Question: "During the summer retreat, if one forgets to take the seven-day rule and goes out once, does he retain the retreat?"
Answer: "If he remembers and immediately repents, he retains it. Within a single retreat, this cannot exceed two or three repentances; if it exceeds two or three repentances, he does not obtain [the year of] seniority."