勅修百丈清規 5.54

5.54

律云。比丘患草蟲聽作拂子。僧祇云。佛聽作線拂列㲲拂芒拂樹皮拂。若描牛尾馬尾并金銀裝柄者。皆不可執。

The Vinaya says: 'When monks are troubled by grass insects, they are permitted to make a flywhisk.' The Mahāsaṃghika Vinaya says: 'The Buddha permitted making thread whisks, fine cotton whisks, miscanthus whisks, and tree-bark whisks. If they are decorated with yak tails, horse tails, or gold and silver handles, none may be held.'