《北史·列传·卷三十六》
天光便率军入陇，进至王庆云所占据的水洛城，攻破他的东城。
天光乃入陇，至庆云所居永洛城，破其东城。
When it was barely daylight, he led his army into Long and reached Shuiluo Fort occupied by Wang Qingyun, breaking through his eastern wall.