金剛經纂要刊定記 3.10

3.10

三、化儀下。謂佛有三衣：一、安陀會，即五條，名下品衣，亦名行道作務儭身等衣。二、欝多羅僧，即七條，名中品衣，亦名入眾說法衣。三、僧伽梨，即九條乃至二十五條，名上品衣，亦名福田衣。製像水田，見生福故。入王城聚落即著此衣，今以入城乞食故著也。

3. Under "The deportment of teaching": this means that the Buddha has three robes: 1. Antarvāsas, which is five strips, called the lower-grade robe, also called the robe for walking the path, doing work, and wearing next to the body. 2. Uttarāsaṅga, which is seven strips, called the middle-grade robe, also called the robe for entering the assembly to expound the Dharma. 3. Saṅghāṭī, which is nine strips up to twenty-five strips, called the upper-grade robe, also called the field-of-merit robe. It is modeled on paddy fields, because seeing it generates merit. When entering royal cities and settlements, one wears this robe; now, because of entering the city to beg for food, he wore it.