Sahih al-Bukhari 4934
Narrated Abdullah:
While we were with the Prophet in a cave, Surat wal-Mursalat was revealed to him 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 ﷺ said, "Kill it!" We ran to kill it but it escaped quickly. The Prophet ﷺ said. "It has escaped your evil, and you too have escaped its evil."
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنِي إِبْرَاهِيمُ، عَنِ الأَسْوَدِ، عَنْ عَبْدِ اللَّهِ، قَالَ بَيْنَمَا نَحْنُ مَعَ النَّبِيِّ ﷺ فِي غَارٍ إِذْ نَزَلَتْ عَلَيْهِ وَالْمُرْسَلاَتِ، فَإِنَّهُ لَيَتْلُوهَا وَإِنِّي لأَتَلَقَّاهَا مِنْ فِيهِ وَإِنَّ فَاهُ لَرَطْبٌ بِهَا، إِذْ وَثَبَتْ عَلَيْنَا حَيَّةٌ فَقَالَ النَّبِيُّ ﷺ " اقْتُلُوهَا ". فَابْتَدَرْنَاهَا فَذَهَبَتْ فَقَالَ النَّبِيُّ ﷺ " وُقِيَتْ شَرَّكُمْ، كَمَا وُقِيتُمْ شَرَّهَا ". قَالَ عُمَرُ حَفِظْتُهُ مِنْ أَبِي فِي غَارٍ بِمِنًى.