A mad camel entered a garden of Bani Najjar. Whoever came into the garden, the camel rushed to bite him. The people were very worried. I went there and said to this camel, come here. When the camel heard the command of the Messenger of Allah, peace and blessings be upon him, it came running and put its head at the feet of the Prophet, peace and blessings be upon him.
         So the people asked Rasoolullah what is this
The Holy Prophet (peace and blessings of Allah be upon him) then said to the Companions (may Allah be pleased with him): Except the disbelievers, everyone on earth and in the heavens knows me that I am the Messenger of Allah.
        (God is great)