四分律比丘含注戒本 2.501

2.501

Apart from water, if one plays with whey, vinegar, or barley gruel in a vessel, all are duṣkṛta. There is no offence: if one wades across water while traveling on the road; or goes from this bank to the other bank; or pulls bamboo, wood, or a raft in water, moving up or down with the current; or gathers stones and sand; or, having lost an article, dives to the bottom of the water, submerging here and emerging there. Or if one learns swimming techniques, lifting the arms and striking the water, or splashing water, there is no offence.