Idiom: People come and go.
Explanation: People come and go in an endless stream. It also describes being busy with social intercourse.
Source: Cao Qingxue Qin's "Dream of Red Mansions" for the hundredth time: "People who come and go in two or three days, I don't care about those people. I don't think you ordered. You have to make us snacks. "
The ancients basically didn't have to "people come and go" until the Qing Dynasty. So there is no related poem.