Who said "Not too slow, not too fast. The hands get it. Words can't."?

Zhuangzi (c. 369–286 BC). Source: Zhuangzi 13 (The Way of Heaven).

What is the original Chinese?

不徐不疾，得之於手而應於心，口不能言. Translated from the original Chinese by Spartan Surfers.

Not too slow, not too fast. The hands get it. Words can't.

Zhuangzi, Zhuangzi 13 (The Way of Heaven)

The source

"Not too slow, not too fast. The hands get it. Words can't." Zhuangzi said it in Zhuangzi 13 (The Way of Heaven). Translated from the original Chinese by Spartan Surfers.

"不徐不疾，得之於手而應於心，口不能言"

Original Chinese, Zhuangzi 13 (The Way of Heaven). 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 "Not too slow, not too fast. The hands get it. Words can't."?: Zhuangzi (c. 369–286 BC). Source: Zhuangzi 13 (The Way of Heaven).
What is the original Chinese?: 不徐不疾，得之於手而應於心，口不能言. Translated from the original Chinese by Spartan Surfers.