《太平广记·卷四百二十·龙三》
那些在北庭沙州做官的，都要先准备供品，到河边认真祭祀祷告一番，然后才能审理政事。
其吏于北庭沙洲者，皆先备牲酎，望祀于河浒，然后敢视政。
Those who held official positions in Beiting Shazhou had to prepare offerings in the first instance, and go to the river to worship and pray, before they could adjudicate on political affairs.