Abu Dawud Book 23, Hadith Number 3902.

Narated By N/A : Abu Hurairah reported the Apostle of Allah (may peace be upon him) as saying: There is no infection, no evil, omen, no serpent, in a hungry belly and no hamah. A nomadic Arab asked: How is it that when camels arc in the sand as if they were gazelles and a mangy camel comes among them and it gives them mange? He replied: Who infected the first one? Ma’mar, quoting al-Zuhri, said : A man told me that Abu Hurairah narrated to him saying that he heard the Prophet (may peace be upon him) say: A diseased camel should not be brought with a healthy camel to drink water.3323 He said: The man then consulted him and said: Did you not tell us that the Prophet (may peace be upon him) had said: There is no infection, no serpent in a hungry belly and no hamah? He replied: I did not transmit it to you. Al-Zuhri said: Abu Salamah said: He had narrated it and I did not hear that Abu Hurairah had ever forgotten any tradition except this one.