《北史·列传·卷三十六》
又对他说 ：我知道你们缺水，现在我军稍为退却，给你们让出水源。 
又谓曰： 相知须水，今为小退。 
He also told them: I understand that you are short of water. I will order my troops to retreat temporarily for now, giving you access to the water source.