大比丘三千威儀 2.102

2.102

The Sarvāstivāda school possesses wide learning, sharp wisdom, and guides and benefits others in Dharma transformation; they should wear deep-red kāṣāyas. The Dharmaguptaka school observes and upholds the heavy precepts and judges according to the Vinaya rules; they should wear black kāṣāyas. The Kāśyapīya school is energetic, courageous, and resolute in rescuing and protecting sentient beings; they should wear magnolia-bark-colored kāṣāyas. The Mahīśāsaka school enters into subtlety through meditation and investigates the profound and obscure; they should wear blue kāṣāyas. The Mahāsāṃghika school diligently studies the various sūtras and expounds the meanings and doctrines; they should wear yellow kāṣāyas.