維摩義記 3.71

3.71

後之二種大小不同。若依小乘，在修道中宣說行淨，以起無漏修道行故；在無學道說行斷淨，以得畢竟斷結行故。若依大乘，後之二種竝在修道，七地已還說行斷淨，以其修習斷結行故，八地已上說思菩提上上淨矣。此以七淨位分上下，故名為布。所言「浴此無垢人」者，彰前八解、定水、七淨之功用也。依前三德蕩除心垢，故名為浴。所浴是誰？謂無垢人。

The latter two differ between Mahāyāna and Hīnayāna. If according to Hīnayāna, purification of practice is taught in the path of cultivation, because one gives rise to the undefiled practices of the path of cultivation; and in the path of the stage beyond training, purification of the abandonment of practice is taught, because one has attained the practice that terminates fetters for good. If according to Mahāyāna, the latter two are both in the path of cultivation: from the seventh bhūmi downwards, it teaches purification of practice-abandonment, because one cultivates the practice of terminating fetters; and on the eighth bhūmi and above, it speaks of the supreme purification of contemplating bodhi. Because the stages of the seven purifications are arranged in higher and lower order, it is called 'spreading'. As for 'Bathing this undefiled person': this shows the functional application of the previous eight liberations, the water of samādhi, and the seven purifications. Relying on the previous three virtues, one washes away mental defilements, hence it is called bathing. Who is the one bathed? It means the undefiled person.