Narrated Jabir told that he heard the Prophet say:
“There is no infection, no serpent in a hungry belly, and no ghoul.”*
Muslim transmitted it.
* I have used the English word derived from the Arabic ghul. It was used of a creature which was a type of jinni or devil which was believed to appear to people in various forms and lead them astray in the desert and cause their destruction.
Narrated ‘Amr b. ash-Sharid told on his father’s authority that there was a man with tubercular leprosy in the deputation of Thaqif and the Prophet sent to him a message:
"We have taken your oath of allegiance, so go home."
He reported God's messenger as saying, “There is no infection, no hama, and no serpent in a hungry belly."
A nomadic Arab asked, “Messenger of God, how is it that when camels are in the sand as if they were gazelles* and a mangy camel comes among them it gives them mange?"
God’s messenger replied, “Who infected the first one?"
Bukhari transmitted it.
* The comparison is used to indicate the clearness of their skin.