Ahmed & Michael

Two Christian missionaries, David and Michael, were lost in a scorching
desert, dying of thirst and hunger when they saw a mosque up front.
David said:
"Michael, let's pretend we are Muslims. Otherwise, we will not get any food
or water and we will die. My name will be Ahmed. What will be your name?"

Michael refused to change his name.

When both of them reached the mosque, the Imam received them well and asked
their names.
David:
"My name is Ahmed."
Michael:
"My name is Michael."

The Imam turned to his helpers and said:
"Please bring food and water for Michael."
Then he turned to David and said:
"Brother Ahmed, Ramadhan Mubarak."