Someone claimed to be God and was brought before the Caliph. Caliph said to him “Last year someone here claimed to be a prophet, and he was put to death.”
“It was well that you did so, for I did not send him.” The man replied swiftly.
Someone claimed to be a prophet, and he was brought to the Caliph, who said to him “I bear witness that you are a stupid prophet.”
The man then said “That is why I have been sent to people like you.” (9th century joke)