《资治通鉴·唐纪·唐纪一》
于是孟才联合了与他有恩旧的人，率领数千名部下，约定早晨起床后准备出发时袭击宇文化及。
孟才乃纠合恩旧，帅所将数千人，期以晨起将发时袭化及。
So Mengcai united with those who had old friendship with him, and led thousands of subordinates to attack Yuwen Huaji when they got up in the morning and prepared to set off.