Who said "Finish as carefully as you started. Then nothing fails."?

Lao Tzu (6th century BC). Source: Tao Te Ching 64.

Finish as carefully as you started. Then nothing fails.

Lao Tzu, Tao Te Ching 64

The source

"Finish as carefully as you started. Then nothing fails." Lao Tzu said it in Tao Te Ching 64. Translated from the original Chinese by Spartan Surfers.

"慎終如始，則無敗事。"

Original Chinese, Tao Te Ching 64. 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 "Finish as carefully as you started. Then nothing fails."?: Lao Tzu (6th century BC). Source: Tao Te Ching 64.
What is the original Chinese?: 慎終如始，則無敗事。. Translated from the original Chinese by Spartan Surfers.