The Donkey

Someone wanted to borrow Juha’s donkey.
Juha did not want to give away his donkey, so he said: ‘My donkey is dead.’
Suddenly, his donkey started braying from behind the wall.
The person heard the donkey and said: ‘But you said your donkey was dead?!’
Juha said:
هل تصدقني أم تصدق الحمار؟
“Do you believe me or a donkey?”