Who said "The sea rules every valley by staying below them."?

Lao Tzu (6th century BC). Source: Tao Te Ching 66.

What is the original Chinese?

江海所以能為百谷王者，以其善下之. Translated from the original Chinese by Spartan Surfers.

The sea rules every valley by staying below them.

Lao Tzu, Tao Te Ching 66

The source

"The sea rules every valley by staying below them." Lao Tzu said it in Tao Te Ching 66. Translated from the original Chinese by Spartan Surfers.

"江海所以能為百谷王者，以其善下之"

Original Chinese, Tao Te Ching 66. Chinese: Wang Bi edition via zh.wikisource.

Who said it

Lao Tzu (6th century BC). Keeper of the archives at the Zhou court, by tradition the author of the Tao Te Ching: eighty-one short chapters on water, softness and knowing when to stop.

Questions

Who said "The sea rules every valley by staying below them."?: Lao Tzu (6th century BC). Source: Tao Te Ching 66.
What is the original Chinese?: 江海所以能為百谷王者，以其善下之. Translated from the original Chinese by Spartan Surfers.