四分律刪繁補闕行事鈔 1.509

1.509

四互用。謂為佛受七日，已用三日；更有法事，便通餘用，故不得也。必有本緣，何爽通用。《十誦》中白餘殘夜用，謂同是一事未了，殘夜白用，非謂異事。若本並因三寶事受，隨所互用，並得，以俱有法故。若三寶事後生，不是前緣，三寶及他雜緣，並不開之，由本無心為受故。乃至為張家施物受日後，受施訖，留受戒者，亦不應住，以無法故；若一家通緣，準心應得。問：此界內僧，為別處三寶、病人受日，得不？答：彌是生善，故得。問：僧次請者，得受日不？答：律制二請，亦得通受。問：得受他捨，請受日不？答：僧次應得，別請不合，以非施主元心故。

Fourth, mutual substitution: That is, having taken leave of seven days for the Buddha, and having already used three days, if there are further Dharma affairs, one then applies the remainder to them; this is not permitted. If there were originally that circumstance, why would one fail to use it generally? In the Daśādhyāya-vinaya, announcing the use of the remaining nights refers to when the same single matter is not yet completed and one announces the use of the remaining nights; it does not refer to different matters. If originally taken entirely because of matters of the Three Jewels, using them interchangeably as appropriate is entirely permissible, because both have the legal basis. If a matter of the Three Jewels arises later and was not the former circumstance, matters of the Three Jewels and other miscellaneous circumstances are not permitted, because originally there was no intention to take leave for them. Furthermore, if one takes leave for days to receive donated goods for the Zhang family, and after receiving the donation, one is detained to administer precepts, one should also not stay, because there is no legal basis; if it were a general circumstance for a single household, according to the intention it should be permissible. Question: May a monk within this sīmā take leave for days for the Three Jewels or a sick person in another place? Answer: It generates even more goodness, so it is permitted. Question: If invited in the regular turn of the saṃgha, may one take leave for days? Answer: The Vinaya establishes both kinds of invitations, so general leave may also be taken. Question: If one receives an invitation to another's house, may one take leave for days? Answer: If by regular turn of the saṃgha, it should be permitted; an individual invitation is not allowable, because it was not the donor's original intention.