《旧唐书·列传·卷四十八》
我顷向温泉，观风省俗，时乘闲暇，畋猎于渭川，网开一面，展三驱之礼，亲自校猎，逐追鸟兽自乐。
予顷向温泉，观省风俗，时因暇景，掩渭而畋，方开一面之罗，式展三驱之礼，躬亲校猎，聊以从禽。
I recently went to the hot springs, observed habits and customs, sometimes I took advantage of the spare time, hunted in Wei Chuan, opened the net on one side, carried out the custom of letting go of animals three times, inspected the hunting personally, and chased after the birds and animals for my own pleasure.