《旧唐书·列传·卷十五》
贞观二十三年，太宗病危，请来长孙无忌和中书令褚遂良接受遗嘱辅佐朝政。
二十三年，太宗疾笃，引无忌及中书令褚遂良二人受遗令辅政。
In the twenty-third year of Zhenguan, Emperor Taizong was critically ill. He summoned Changsun Wuj and secretary of state Chu Suiliang to receive his will to assist in governing the court.