The worst sin

One day 3 men went to a shrine to ask the Father for forgivness.

The first man went to the Father and said: " Father, Father I have sinned!"
Father: "What have you done?"
The first man:" I have lied!"
Father: "Drink the Holy water and you will be saved."
And so the man drank the water and was "saved".

Then the second man went up to the Father and said:" Father, Father I have sinned!"
Father: "What have you done?"
The second man: " I have stolen from the jeweler's!"
Father: "Drink the Holy water and you will be saved."
And so the man drank the holy water and was "saved".

The third man went up to the Father and said: " Father, Father I have sinned!"
Father: "What have you done?"
The third man: " I peed in the Holy water!"