佛祖統紀 33.9

33.9

浴僧　首陀會天請佛及僧洗浴供養。佛告阿難。此天由此福行未來得佛。號曰淨身（賢愚經○首陀會天子名也。凡稱天而非六欲十八梵之名者皆天子也。如耆婆毘首羯磨等。皆忉利天子也）許數數浴生世善故（四分律）。

Bathing the Monks: A devaputra of the Śuddhāvāsa Heaven requested the Buddha and the Saṃgha to bathe and offered them food. The Buddha told Ānanda, 'Through this meritorious deed, this deity will in the future become a Buddha named Pure Body' (from the *Sūtra of the Wise and the Foolish*; Śuddhāvāsa is the name of a devaputra. Whenever one is called a "deva" without bearing the name of the six heavens of desire or the eighteen heavens of the form realm, all are devaputras, just as Jīvaka, Viśvakarman, and so forth are all devaputras of the Trāyastriṃśa Heaven). Frequent bathing is permitted because it produces worldly good (from the *Dharmaguptaka Vinaya*).