四分律比丘含注戒本 1.592

1.592

衣時者，自恣竟，不受迦絺那衣一月，受衣五月。若自恣十日在，得急施衣，受已，至一月、五月畜。乃至明日自恣應受，一月、五月外更增九日也。

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.