《资治通鉴·隋纪·隋纪一》
待到雨季春水既涨，上游周罗等军必定顺流而下赶来增援。
待春水既涨，上江周罗睺等众军必沿流赴援，此良策也。 
When the spring water rises in the rainy season, the Zhou Luo and other armies upstream will definitely come down the river to reinforce.