Who said "Thirty spokes, one hub. The empty center makes it roll."?

Lao Tzu (6th century BC). Source: Tao Te Ching 11.

What is the original Chinese?

三十輻共一轂，當其無，有車之用。. Translated from the original Chinese by Spartan Surfers.

Thirty spokes, one hub. The empty center makes it roll.

Lao Tzu, Tao Te Ching 11

The source

"Thirty spokes, one hub. The empty center makes it roll." Lao Tzu said it in Tao Te Ching 11. Translated from the original Chinese by Spartan Surfers.

"三十輻共一轂，當其無，有車之用。"

Original Chinese, Tao Te Ching 11. 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 "Thirty spokes, one hub. The empty center makes it roll."?: Lao Tzu (6th century BC). Source: Tao Te Ching 11.
What is the original Chinese?: 三十輻共一轂，當其無，有車之用。. Translated from the original Chinese by Spartan Surfers.