Tougher than a rock.
More Arabic Proverbs:
Avoid what will require an apology.
Arabic
If power is for sale, sell your mother to buy it
Arabic
If power is for sale, sell your mother to buy it
Arabic
This dead person is not worth all of this grief.
Arabic
The frying-pan says to the kettle, The frying-pan says to the kettle, "Avaunt, black brows!"
Arabic