《资治通鉴·唐纪·唐纪十一》
侯君集征讨高昌时，曾派人约焉耆与他们合围高昌，焉耆高兴，愿意听命。
侯君集之讨高昌也，遣使约焉耆与之合势，焉耆喜，听命。
When Hou Junji conquered Gaochang, he sent someone to make an agreement with Yanqi to besiege Gaochang together. Yanqi was happy about it, and agreed to follow the order.