釋氏要覽 2.82

2.82

律云比丘患草虫。佛聽作拂子○僧祇云。佛聽線拂列㲲拂甚拂樹皮拂制。若猫牛尾馬尾拂。并金銀裝柄者。皆不得執。

The Vinaya says: When monks suffered from grass insects, the Buddha permitted them to make fly whisks. The Mahāsāṃghika Vinaya says: The Buddha permitted thread whisks, fine cotton whisks, coarse cloth whisks, and tree-bark whisks. Whidks made from cat tails, cow tails, or horse tails, as well as those with handles adorned with gold and silver, may not be held.