Use your enemy’s hand to catch a snake.
More Persian Proverbs:
You can't put an old head on young shoulders.Persian
The arrow that has left the bow never returns.
Persian
Who has not had a taste longs to do so, but for whom has tasted then the longing is a hundred times more.
Persian
The shoemaker's shoes have no heels.
Persian
If the teacher be corrupt, the world will be corrupt.
Persian
Once I had the strength but no wisdom; now I have the wisdom but no strength.
Persian