From Tao Zhu's poem "Gift to Zeng Zhi"

It is difficult for me to go to the battlefield again, my love for you is as thick as the clouds.

The ruthless white hair drives the cold and heat, The remaining life of dirt suppresses bitterness.

A sick horse also knows how late it is to neigh, and a withered sunflower feels even more timid and frosty.

The past is forgotten like smoke, and the world is wide with selflessness in my heart., 10 , all the past events are forgotten like smoke, and the selfless world in my heart is wide.

—— Tao Zhu, 1. Forget the past like smoke, and have a selfless heart. Which famous person said this famous saying?

Please answer!