Once when Hazrat Ali was going to the mosque he gave his armor to one person to protect it. Upon return he learned that the person ran away with the armor and sold it for 2 dirhams. Hazrat Ali remarked, I had planned to give him 2 dirhams as wage for protecting my armor upon return,
he had anyways 2 dirhams written in his fate but he chose to earn it through the wrong method.
( as heard from someone , sharing it with for the benefit of the lesson)