《金史·列传·卷三十二》
夹谷清臣坚决请求，于是赐给他探亲假，并告诉他说： 听说你母亲年老，准备让你探亲，所以特给你五十天假，你骑快马回去，到那里可停留一个月。 
固请，乃赐告省亲，谕之曰： 闻卿母老，欲令归省，故特给假五十日，驰驿以往，至彼可为一月留也。 
Jiagu Qingchen insisted on his request, so he was granted leave to visit his parents, and told him: I heard that your mother is old, and so I will prepare for you to visit your parents, especially giving you a fifty day break, and you may rest there for a month.