يد واحدة لا تصفق

I'm resorting to Wikiquote again. I wish that they would tell where the proverbs are from, so if  you know the origin of this proverb, comment below.

  يد واحدة لا تصفق
(yed wahida la tesfaq)
Literal meaning: One hand cannot clap.

Meaning: People should cooperate to get things done, as in the English proverb "Two heads are better than one."