量處輕重儀 2.38

2.38

一者，三衣。謂僧伽梨（上衣也）。欝多羅僧（中衣也）。安陀會（此云下著衣）。律本云，自今已去，畜三衣，不得過。《多論》云，一切外道無此三名，佛自制立。《阿含》云，此名法衣也。

The first is the three robes: namely the saṅghāṭī (the upper robe), the uttarāsaṅga (the middle robe), and the antarvāsa (here called the undergarment). The root Vinaya states: "From now on, keep the three robes and do not exceed [them]." The Da lun states: "No tīrthikas have these three names; the Buddha instituted them himself." The Āgamas state: "These are named Dharma robes."