《旧唐书·本纪·卷二》
派遣长孙无忌、房玄龄等人在名山大川求雨，中书舍人杜正伦等人往关内各州安抚慰问。
遣长孙无忌、房玄龄等祈雨于名山大川，中书舍人杜正伦等往关内诸州慰抚。
Changsun Wuyi, Fang Xuanling, and others were sent to pray for rain in the famous mountains and rivers, and the imperial attendant of the household department, Du Zhenglun, and others went to appease and comfort the various prefectures inside the pass.