The arrow that has left the bow never returns.
More Persian Proverbs:
An ungrateful son is a wart on his father's nose -- he leaves it, it's ugly, he removes it, it hurts.Persian
The loveliest faces are to be seen by moonlight, when one sees half with the eye and half with the fancy.
Persian
For his master the dog is a lion.
Persian
A broken hand works, but not a broken heart.
Persian
Courtesy on one side can never last long.
Persian
If the Sultan demands five eggs, let his soldiers roast a thousand chickens.
Persian