宗四分比丘隨門要略行儀 1.13

1.13

受持三衣文（三衣道德三聖寶重教文敬。類如佛塔名體顯未曾有法。功能摧九十六道服行護須遵聖法。若不加受衣若無衣。他部自部咸皆制受堅慈所誨幸奉居心）。

Text on Receiving and Maintaining the Three Robes: (The three robes embody the virtue of the Way; the three holy ones treasure them. The scriptural texts venerate them similarly to a stūpa. Their designations and substance manifest unprecedented phenomena; their efficacy destroys the ninety-six non-Buddhist schools. In wearing, practicing, and guarding them, one must comply with the holy Dharma. If one does not formally receive them, the robe is treated as having no robe. Both other schools and our own school all rule that they must be received. The instructions of the steadfastly compassionate one should fortunately be received and borne in mind.)