Keep grinding and an iron bar becomes a needle.

The source

"Keep grinding and an iron bar becomes a needle." This Chinese proverb is recorded in Shantang sikao 182 (the old woman grinding the pestle). Translated from the original Chinese by Spartan Surfers.

"鐵杵磨成針只要工夫深"

Original Chinese, Shantang sikao 182 (the old woman grinding the pestle). Chinese: Shantang sikao, juan 182 (Siku quanshu text) via zh.wikisource; Told of the young poet Li Bai.

Who said it

Proverbs of the world (Every age). Sayings from the Latin, Greek, Norse, Japanese, Chinese and more, each traced to an old source in its own language.

Questions

Who said "Keep grinding and an iron bar becomes a needle."?

Chinese proverb. Source: Shantang sikao 182 (the old woman grinding the pestle).

What is the original Chinese?

鐵杵磨成針只要工夫深. Translated from the original Chinese by Spartan Surfers.