yǐn shuǐ sī yuán

ㄧㄣˇ ㄕㄨㄟˇ ㄙㄩㄢˊ

1Don't forget where your happiness come from.

2Be grateful for all your blessings!

3lit. when you drink water, think of its source (idiom); gratitude for blessings and their well-spring