釋氏要覽 1.307

1.307

The Mahāsāṃghika-vinaya mentions 'loop-ties'. The Jiyao says: 'The front has the hook; the back has the loop. Formerly this did not exist. Because the Buddha instituted the niṣīdanamat to be placed under the robe on the left arm, there was nothing weighing down the robe on the shoulder, and it became untidy; when begging for food, it was blown off by the wind, so the Buddha then permitted the addition of hooks and loops. The Buddha instituted that gold, silver, or precious materials must not be used on hooks and loops; only things such as ivory, bone, and fragrant wood are permitted.'