He said, there was a man here named Nawwas who owned some thirsty camels. Ibn Umar went and bought those camels from his partner.His partner came to him and said, "We sold those camels."He asked, "To whom did you sell them?"He replied, "To an old man, such and such."He said, "Woe to you, by Allah, that was Ibn Umar."So he came to Ibn Umar and said, "My partner sold you thirsty camels without informing you of it. Take them back."When he went to drive them away, Ibn Umar said, "Leave them. We are content with the ruling of the Messenger of Allah ﷺ, 'There is no contagion.'"
قال كان هاهنا رجل اسمه نواس، وكانت عنده إبل هيم فذهب ابن عمر، فاشترى تلك الإبل من شريك له، فجاء إليه شريكه، فقال: بعنا تلك الإبل، فقال: ممن بعتها؟ قال: من شيخ كذا وكذا فقال: ويحك ذاك-والله- ابن عمر فجاءه فقال: إن شريكي باعك إبلا هيما ولم يعرفك قال: فاستقها. قال: فلما ذهب يستاقها فقال: دعها، رضينا بقضاء رسول الله ﷺ: لا عدوى.
Bukhari related it in the Book of Sales (2099) from Ali (that is, Ibn Madini), from Sufyan (that is, Ibn Uyayna), from Amr bin Dinar, and he mentioned it.Regarding the word "al-heem," Tabari said in his tafsir of Allah's statement, "then drinking like the drinking of diseased camels" [Waqiah 56:55], that al-heem is the plural of ahyam. Some Arabs say haaim, and then form its plural as heem, just as they said ghait and gheet.He said, the heem camels are those afflicted by al-hiyam, with the ha pronounced either with a damma or a kasra, a disease that leaves them thirsty so that they drink without ever being satisfied. It is also said that the heem camels are those smeared with tar because of mange, which makes them thirsty from the heat of the mange. And it is also said that it is a disease from which mange develops.In the same vein is what has been related from Ibn Umar, who said that the Messenger of Allah ﷺ said, "There is no contagion, no bad omen, and no haamah." A Bedouin man then stood up before him and said, "Messenger of Allah, what do you say about a camel that has mange and then infects the entire herd?" He said, "That is decreed, so who gave mange to the first one?"Ibn Majah related it (86, 3540), and Ahmad (4775), both by way of Waki, who said, Abu Janab told us, from his father, from Ibn Umar, and he mentioned it.Abu Janab is Yahya bin Abu Haya Kalbi. Scholars weakened him because of his extensive tadlis (concealment in transmission). Ibn Hibban said, "He used to conceal that he had actually heard reports from weak narrators, presenting them as if from trustworthy ones, so these problematic reports that he transmits from famous narrators became attached to him." Busiri faulted the hadith on this basis in Zawaid bin Majah.