大比丘三千威儀 1.57

1.57

There are five matters regarding wearing the three Dharma robes: first, wearing the nivāsana, without an inner garment above, one must not put on the antarvāsas; second, wearing the inner garment, without the antarvāsas above, one must not put on the uttarāsaṅga; third, wearing the antarvāsas, without the uttarāsaṅga above, one must not put on the saṃghāṭī; fourth, the three robes must be made even inside and out; fifth, they must not exceed three colours. Walking in accordance with the Dharma—this is the method of the Way.