They don’t count the teeth of a gift horse.
More Persian Proverbs:
You've grazed so much, where's your tail-fat?Persian
What my heart wanted didn't happen -- What God wanted, that happened.
Persian
He that sows shall also reap.
Persian
If a fool borrows a book cut off his hand; but cut off both hands of the fool who brings it back.
Persian
I murmured because I had no shoes, until I met a man who had no feet.
Persian
A man's servant can live for a hundred years; the slave of a woman dies in six months.
Persian