Pratimoksha of the Dharmaguptakas 1.118

1.118

「若比丘！先受請已，前食、後食行詣餘家，不囑授餘比丘，除餘時，波逸提。餘時者，病時、作衣時、施衣時，是謂餘時。

If a monk, having been previously invited (to dine), go either before or after the meal to other houses (for alms), without any commission from the rest of the monks, this is pācittiya, except on certain occasions, viz., at the time of sickness, when making the clothes, when clothes are pre sented.