Poetry belongs to young people and prose belongs to middle-aged people. Who said that?

Didn't find this statement, similar to:

Young people should read history, while middle-aged people should read poetry and prose. -Liang.

I hope young people can read some history books, not necessarily from the source, but at least from the modern history, at least to "understand" some. Middle-aged people should read some poems and essays. We must understand that it is not easy for children to live now, and the competition is so fierce.