Where does the phrase "water has activity and trees have roots" come from?

"Water is active and trees have roots" comes from Zhao Benshan and Huang Xiaojuan's performance sketch "I want to have a home".

Lines:

Zhao Benshan: Everyone laughed. Hehe, the marriage market is weak when you get older. There's no shame in advertising for marriage on TV, is there? Water is active, trees have roots, and there is a reason to advertise for marriage on TV. If you have no money in your pocket, you are eager for cash. If you don't have a home, it is hot water. If you have been single for so many years, who doesn't expect to get married? Everybody laughs! !