《旧唐书·列传·卷十九》
于是李靖把唐军分成南北二路一起深入敌境，李靖与薛万均、李大亮取北路，派侯君集、李道宗取南路，途中经过破逻真谷，翻越汉哭山，途经二千余里，行军在茫茫沙漠，盛夏降霜，山多积雪，转战经过星宿川，到达柏海，屡次与贼寇交战，都获得大胜。
靖乃中分士马为两道并入，靖与薛万均、李大亮趣北路，使侯君集、道宗趣南路。历破逻真谷，逾汉哭山，经途二千余里，行空虚之地。盛夏降霜，山多积雪，转战过星宿川，至于柏海，频与虏遇，皆大克获。
So Li Jing divided Tang troops into two routes to advance deeply into enemy territory. LI Jing, Xue Wanjun, and Li Daliang took the northern route, and Hou Junji and Li Daozong took the southern route. They passed through Po Luo Zhen Valley and crossed Han Ku Mountain, traveling over two thousand miles through a vast desert. In the middle of summer, frost fell, and there was much snow on the mountains. They skirmished through Xingxu River and reached Baihai. They fought many battles with the rebels and won great victories.