What poem are the top two lines of the sculptures of the Poetry Soul Group in the Furong Garden of the Tang Dynasty?

Walking to a water-poor place, sit and watch the clouds rise.

1. This poem is a famous line by Li Bai, which was engraved on the top of the sculptures of poetry souls in the Furong Garden of the Tang Dynasty.

2. The content of the whole poem is: "I was quite good at Taoism in my middle age. In my later years, I came home to the southern border of the mountains. Every time I was happy, I went alone. I knew I had no success. When I walked to a waterless place, I sat down and watched the clouds rise. Occasionally, I visited Lin Sou, chatting and laughing for a long time."