ما يحَكّ للحَيّ لَذّ مِن يده

A Libyan proverb from dormirdebout.wordpress.com

ما يحَكّ للحَيّ لَذّ مِن يده

Literal meaning: Nothing can scratch your itch but your own hand.
 Meaning: No one will do your job or look after your interests. I think this is similar to the English proverb "God helps those who help themselves'.

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."