四分律比丘含注戒本 1.592

1.592

As for the robe-time: after the pravāraṇā concludes, if one does not accept the kaṭhina robe, it is one month; if one accepts the robe, it is five months. If ten days remain before pravāraṇā and one obtains an emergency robe-offering, having accepted it, one may keep it for up to one month or five months. Even if one should accept it the day before pravāraṇā, nine days are further added beyond the one month or five months.