四分律比丘含注戒本 3.106

3.106

不犯者，或有病，脇下生瘡，若僧伽藍內，若村外，若作時，若道路行者。

There is no offence: if one is ill, having sores under the armpits; if within a saṅghārāma; if outside a village; if at a time of work; or if walking along a road.