The haft of the arrow had been feathered with one of the eagle's own Lures. We often give our enemies the means of our own destruction.
Straw shows which way the wind is blowing.
Destroy the seed of evil, or it will grow up to your ruin.
One who steals has no right to complain if he is robbed.
I am sure the grapes are sour.
Faithful are the wounds of a friend; but the kisses of an enemy are deceitful.