Sahih Bukhari

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, ""No 'Adwa."" Abu Huraira also said: The Prophet (ﷺ) said, ""The cattle suffering from a disease should not be mixed up with healthy cattle (or said ""Do not put a patient with a healthy person as a precaution."") Abu Huraira also said: Allah's Messenger (ﷺ) said, ""No 'Adwa."" A bedouin got up and said, ""Don't you see how camels on the sand look like deer but when a mangy camel mixes with them, they all get infected with mange?"" On that the Prophet (ﷺ) said, ""Then who conveyed the (mange) disease to the first camel?