《旧唐书·本纪·卷九》
六日，封皇孙亻叔等十九人为郡王。冬十月十一日，驾到温泉宫。
九月庚寅，封皇孙俶等十九人为郡王。冬十月甲子，幸温泉宫。
On the 6th, 19 grandsons including King Ren were enfeoffed as county kings. On the 11th day of October in winter, he arrived at the Wenquan Palace.