《资治通鉴·后梁纪·后梁纪一》
因为河东地狭兵少，于是训练士卒，命骑兵看不见敌人不准骑马。
以河东地狭兵少，乃训练士卒，令骑兵不见敌无得乘马。
Since Hexi was a small place and had few soldiers, they trained and drilled the soldiers, and ordered the cavalry not to ride horses unless when they saw the enemy.