What is the poem about going to the water to say goodbye?

This is a famous sentence "I will keep walking until the water blocks my way".

There are many poems in my seclusion in Zhongnanshan written by the Tang Dynasty poet Wang Wei: My heart found its way in middle age, and I came to the foot of this mountain. Interest concentration is often unique to play and have a happy thing to enjoy self-appreciation. Sometimes go to the end of the water to seek the source, or sit and watch the ever-changing clouds rise. Occasionally I met a village elder in the Woods, and I chatted with him until I often forgot to go home.

This poem is one of the representative works of the pastoral poet Wang Wei in Tang Dynasty. In the poem, the leisure of enjoying oneself after retirement is vividly written. The poet was depressed and wandered alone. At the end of the water, he sat still and watched the changes of the clouds, vividly depicting the image of a hermit, just like seeing him. Talking and laughing with the old people in the mountains, forgetting the time to go home, I am very free. This is a typical example captured by the poet in a typical environment, which highlights the open-minded character of the retired person. Poetic language is as plain as words, but it is very skillful, both poetic and rational.