《礼记·杂记下》
在倚庐中加冠后，进入灵堂，每哭一次跳起跺脚三次，一共哭三次跳起九次，然后走出灵堂。
既冠于次，入哭踊，三者三，乃出。
After getting crowned under Yi Lu, enter the mourning hall, jump up and stomp feet three times each time you cry, cry three times and jump up nine times in total, then leave the mourning hall.