It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once we were with the Prophet (peace and blessings be upon him) in a cave when Surah Mursalat was revealed to the Prophet (peace and blessings be upon him), and I memorized it as soon as it came from the mouth of the Prophet (peace and blessings be upon him). The Surah was still fresh on the blessed lips of the Prophet (peace and blessings be upon him). I do not remember which verse you (peace and blessings be upon him) finished «‏‏‏‏﴿فَبِأَيِّ حَدِيثٍ بَعْدَهُ يُؤْمِنُونَ﴾» ‏‏‏‏ or «‏‏‏‏﴿وَإِذَا قِيلَ لَهُمُ ارْكَعُوا لَا يَرْكَعُونَ﴾» ‏‏‏‏ when suddenly a snake appeared and quickly entered a hole. The Prophet (peace and blessings be upon him) said: "You are saved from its evil and it is saved from your evil."