杯水之敬

Explanation: Hsieh made the still glass of water. 　　Source: "Qiludeng" third eight back: "Kong Yun Xuan said: 'Xiao Xu Hui-industry people and old teacher, was originally a brother say, and this school has been two months, younger brother of the King there is no glass of water, so (prepared feast) and requested to accompany the three light '. " Thesaurus:  Glasses of Xie