Al-Mursalat 77:4

<h2>Which was revealed in Makkah</h2><h2>The Revelation of this Surat and its Recitation in the Maghrib Prayer</h2><p>Al-Bukhari recorded from `Abdullah - that is Ibn Mas`ud -- that he said, "While we were with the Messenger of Allah ﷺ in a cave at Mina,</p><p>وَالْمُرْسَلَـتِ</p><p>(By the Mursalat.) was revealed to him. He was reciting it and I was learning it from his mouth. Verily, his mouth was moist with it when a snake leaped out at us. The Prophet said,</p><p>«اقْتُلُوهَا»</p><p>(Kill it!) So we quickly went after it, but it got away. Then the Prophet said,</p><p>«وُقِيَتْ شَرَّكُمْ، كَمَا وُقِيتُمْ شَرَّهَا»</p><p>(It was saved from your harm just as you all were saved from its harm.)" Muslim also recorded this Hadith by way of Al-A`mash. Imam Ahmad recorded from Ibn `Abbas, who reported from his mother that she heard the Prophet reciting</p><p>وَالْمُرْسَلَـتِ عُرْفاً</p><p>(By the Mursalat.) in the Maghrib prayer. In a report from Malik on the authority of Ibn `Abbas, he narrated that Umm Al-Fadl (his mother) heard him (Ibn `Abbas) reciting</p><p>وَالْمُرْسَلَـتِ عُرْفاً</p><p>(By the Mursalat `Urfa.) (77:1) so she said, "O my son! You reminded me with your recitation of this Surat. Verily, it is the last thing I heard from the Messenger of Allah ﷺ. …

By those who winnow with a winnowing,

Then separate them, one from another,

And by the Verses (of the Quran) that separate the right from the wrong.

Separating decisively.