A priest goes into a barbershop, gets a haircut, thanks the barber, and
asks how much he owes him. The barber says, "Father, you're a holy man,
a man of the cloth, I couldn't charge you, it's on the house." The
priest says, "Thank you very much" and leaves.
The next day, magically appearing on the doorstep of the barbershop are
12 gold coins.
A few days later, a Buddhist monk goes in for a shave and a shine, and
when the time comes to pay the barber says, "No money, please, you're a
spiritual leader, a man of the people, it's on the house."
The next day, magically appearing on the doorstep are 12 rubies.
The following week a rabbi comes in, gets a haircut, goes to pay, and
the barber says, "No, Rabbi, you are a learned man, a wise man, I can't
take any money from you, go in peace."
And the next day, magically appearing on the doorstep of the barbershop
are 12 rabbis.