Because the Prophet Muhammad (peace be upon him) ordered the drinking of camel urine along with their milk, and if their urine was impure, he (peace be upon him) would not have ordered it to be drunk, while he (peace be upon him) has already stated that there is no cure in something that is unlawful. And he (peace be upon him) also ordered seeking cure through camel urine. Therefore, if it were impure, it would be unlawful and would cause illness instead of cure, and there would be no cure in it, as the Prophet Muhammad (peace be upon him) has stated that when he (peace be upon him) was asked,“O Messenger of Allah, can wine be used as medicine?”he (peace be upon him) replied:“Wine is a disease, not a cure.”

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that some people or some men from the tribes of ‘Ukl and ‘Uraynah came to the service of the Messenger of Allah (peace and blessings be upon him) in Madinah Munawwarah and announced their acceptance of Islam. They said,“O Messenger of Allah (peace and blessings be upon him), we are people who keep livestock (we herd animals) and we are not farmers.”Then the climate of Madinah Munawwarah did not suit them (so they became ill). The Messenger of Allah (peace and blessings be upon him) ordered that some camels and a shepherd be given to them, and instructed them to go out (outside Madinah Munawwarah) with those camels and drink their urine and milk. Then the complete hadith was narrated.