四分戒本疏卷第一．第二．第三 3.104

3.104

水中嬉戲戒第五十二　多論四義故制。一佛法尊重。理宜表敬。今入水遊戲。損壞匪輕。二理宜威儀庠序。外長信敬。入水遊戲。動越威儀。招世譏過。三宜息修道入水遊戲。妨廢正業。四宜修正念。入水戲謔。令心散亂。失正念故。是以聖制　別緣有三。一是水。二無緣。三戲即犯。此戒因十七群河中遊戲。波斯匿王遙見譏嫌。佛便制。

The fifty-second precept on sporting in the water. The Sarvāstivāda-vinaya-vibhāṣā states that it was instituted on account of four meanings: 1. The Buddhadharma is revered, and in principle one ought to manifest respect; now entering the water to play damages it not lightly. 2. In principle one ought to have serene comportment, externally increasing faith and reverence; entering the water to play breaches bodily comportment and invites worldly criticism and fault. 3. One ought to cease worldly affairs to cultivate the path; entering the water to play hinders and abandons proper practice. 4. One ought to cultivate right mindfulness; entering the water to sport and joke makes the mind scattered, causing the loss of right mindfulness. For these reasons the Sage instituted it. The specific conditions are three: 1. It is water; 2. Absence of a cause; 3. Sporting immediately constitutes the offense. This precept was instituted because the group of seventeen were sporting in a river, King Prasenajit saw them from afar and criticized them, and the Buddha then instituted it.