Pratimoksha of the Dharmaguptakas 1.123

1.123

「若比丘！請四月與藥，無病比丘應受；若過受，除常請、更請、分請、盡形壽請者，波逸提

If a monk be asked to receive such things as are allowed during time of sickness, extending over a period of four months, he may accept the invitation for this period, even though he be at the time in good health, but if he exceeds such a term, except there be a perpetual invitation, or a new invitation, or a partial invitation, or a general invitation, it is pācittiya.