Imam Hassan Askari (as) and the knowledge of hidden things:

Ismail says, "I was sitting on the way of our 11th Imam, Imam Hassan
Askari (as) so that I may stop him while he passes that way and ask
him for help."
Prior to that, I had hidden two hundred (200) golden coins with me as
a future provision for myself.
Suddenly, when I was lost in my ideas, Imam Hassan Askari (as) passed
by me. I rushed after him, stopped him and told him about my poverty
and misery and swear that I had nothing from the material sources.
Imam Hassan Askari (as) was very much annoyed with my swearing. He
told his servant to give me what was available with him. The servant
put hand in his pocket and brought out a sack of gold and gave it to
me.
Then Imam Hassan Askari (as) addressing me said, "We do not deprive
anybody from our help but you took a false oath and made Allah (SWT)
angry. You must never do that again and not deny the blessings of
Allah (SWT) in future and depend upon Allah (SWT) and have hope from
him, make use and benefit of the boon which He has given to you. You
have concealed two hundred golden coins in a corner so that it may be
of use and benefit to you on your rainy day. But beware, you will not
have an approach and lay your hands upon them, while you need them."
Ismail says, Imam Hassan Askari (as) made me aware and conscious about
my fault by his words. What he had said did occur.
One day when I extremely needed those coins, I rushed towards the
place I had buried them. But when I dug the place I was surprised to
see that there was no sign of the coins.
I came to know that my son got informed about them and did an ugly act
by picking them up without my permission and running away. Exactly the
way Imam Hassan Askari (as) said, that I would not lay my hand upon
them at the time of need.
There after, I decided to control myself and put a restraint upon my
faults and be a chaste and pious person before Allah (SWT).
Moral:You should trust in Allah (SWT) to look after you. You should
thank Allah (SWT) for whatever He has given you. You should never lie,
as you will be found out. Even if no-one finds out, Allah (SWT) knows.