Who said "Every river runs into the sea, and the sea never fills."?

Zhuangzi (c. 369–286 BC). Source: Zhuangzi 17 (The Floods of Autumn).

What is the original Chinese?

天下之水，莫大於海，萬川歸之，不知何時止，而不盈. Translated from the original Chinese by Spartan Surfers.

Every river runs into the sea, and the sea never fills.

Zhuangzi, Zhuangzi 17 (The Floods of Autumn)

The source

"Every river runs into the sea, and the sea never fills." Zhuangzi said it in Zhuangzi 17 (The Floods of Autumn). Translated from the original Chinese by Spartan Surfers.

"天下之水，莫大於海，萬川歸之，不知何時止，而不盈"

Original Chinese, Zhuangzi 17 (The Floods of Autumn). Chinese: Zhuangzi text via zh.wikisource; chapter title after Legge 1891.

Who said it

Zhuangzi (c. 369–286 BC). Taoist storyteller of the butterfly dream, the useless tree and the cook who never dulled his knife.

Questions

Who said "Every river runs into the sea, and the sea never fills."?: Zhuangzi (c. 369–286 BC). Source: Zhuangzi 17 (The Floods of Autumn).
What is the original Chinese?: 天下之水，莫大於海，萬川歸之，不知何時止，而不盈. Translated from the original Chinese by Spartan Surfers.