Sahih Bukhari Volume 003, Book 029, Hadith Number 056.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 29. Penalty of Hunting While on Pilgrimage
Narated By 'Abdullah : While we were in the company of the Prophet in a cave at Mina, when Surat-wal-Mursalat were revealed and he recited it and I heard it (directly) from his mouth as soon as he recited its revelation. Suddenly a snake sprang at us and the Prophet said (ordered us): "Kill it." We ran to kill it but it escaped quickly. The Prophet said, "It has escaped your evil and you too have escaped its evil."