釋氏要覽 3.114

3.114

This is a tool for sitting in meditation. The sūtra states: 'It is made of tanned leather (cured leather is called wei), one foot wide and eight feet long, with a hook at the end. Passing from the back around to the front, it binds both knees to keep them immovable. Because beginners practicing seated meditation easily fatigue, this is used to restrain the body and assist its strength; thus it is called a good support. When finished using it, hide it away in a concealed place.'