《旧唐书·本纪·卷三》
皇上登高见此情况，想不处罚，恐怕有损军令，于是回马入谷而回避之。
上乘高望见之，欲舍其罚，恐亏军令，乃回辔入谷以避之。
The Emperor went up high and saw what was going on. He intended not to punish them, but he was afraid that this would damage the military regulations, so he turned his horse into the valley to avoid them.