《礼记·玉藻》
当殡硷时要捶胸顿足地哭，应该脱笛。将要插笛于带而入朝见君，一定要先洗手，洗过以后，在朝中需要执贫时就不必再洗手了。
笏度二尺有六寸，其中博三寸，其杀六分而去一。
When burying the corpse, one should beat one's chest and wail, and the fan should be removed. When intending to insert the fan into one's belt and enter court to meet the lord, it is essential to first wash one's hands. After having washed them, no further hand washing is required on the subsequent occasions when holding the fan in court.