四分律行事鈔資持記 3.237

3.237

四中。薄軟氈輕者，儀云：厚䩕入重，而薄堪可裁縫，不同𣰽毹；全是俗懷，此氈通於道務也。

In the fourth: that thin, soft felt is light: The Ceremonial Standard states: "Thick, stiff ones are reckoned as heavy, but thin ones that can be cut and sewn differ from woollen rugs; they are entirely of secular disposition, whereas this felt is suitable for the duties of the path."