It was narrated that Ibn 'Umar said:
"The Messenger of Allah (ﷺ) said: 'There is no 'Adwa (contagion), no Tiyarah (evil omen) and no Hamah.' A Bedouin man stood up and said: 'O Messenger of Allah, what do you think about a camel that suffers from mange and then all other camels get mange?' He said: 'That is because of the Divine Decree. How else did the first one get mange?'"
English reference: Vol. 1, Book 1, Hadith 86
Arabic reference: Book 1, Hadith 91