Charity box story

One young man went to the Shopping Mall.
While in the entrance he stop and took his wallet and looked it, take one notes ten riyal and put the ten riyal inside the Charity Box near his stand.

Then after, his shoulder tap by old man from the back and the old man raise his hand and give the young man two five hundred riyal notes.

the young man surprised and in the next second he put those two notes inside the charity box.

".... it's too much, isn't it for charity ?..." told young man to old man,,smile his face.

"...No..!,..." said old man.
"..That was your money, you drop it from your pocket and I just want to give it you back.."
"..........."