Yahya reported,

I asked Abu Salama which part of the Quran was revealed first, and he said, "You who are wrapped in a cloak" [Muddaththir 74:1].I said, "Or was it 'Recite'?"He replied, "I asked Jabir bin Abdullah which part of the Quran was revealed first, and he said, 'You who are wrapped in a cloak' [Muddaththir 74:1]."I said, "Or was it 'Recite'?"Jabir said, "I am telling you only what the Messenger of Allah ﷺ told us. He said, 'I stayed at Hira for a month, and when my stay was completed I came down and made my way into the bottom of the valley. Someone called out to me. I looked in front of me and behind me, to my right and to my left, but I saw no one. Then I was called again. I looked, but saw no one. Then I was called again, and I raised my head, and there he was upon a throne in the air,' meaning Jibreel . 'A violent trembling seized me, so I went to Khadijah and said, "Cover me up." They covered me up and poured water over me, and then Allah revealed, "You who are wrapped in a cloak, arise and warn, and magnify your Lord, and purify your garments" [Muddaththir 74:1–4].'"

و حدثنا زهير بن حرب حدثنا الوليد بن مسلم حدثنا الأوزاعي قال سمعت

يحيى يقول

سألت أبا سلمة أي القرآن أنزل قبل قال {يا أيها المدثر} فقلت أو اقرأ فقال سألت جابر بن عبد الله أي القرآن أنزل قبل قال {يا أيها المدثر} فقلت أو اقرأ قال جابر أحدثكم ما حدثنا رسول الله ﷺ قال جاورت بحراء شهرا فلما قضيت جواري نزلت فاستبطنت بطن الوادي فنوديت فنظرت أمامي وخلفي وعن يميني وعن شمالي فلم أر أحدا ثم نوديت فنظرت فلم أر أحدا ثم نوديت فرفعت رأسي فإذا هو على العرش في الهواء يعني جبريل عليه السلام فأخذتني رجفة شديدة فأتيت خديجة فقلت دثروني فدثروني فصبوا علي ماء فأنزل الله عز وجل {يا أيها المدثر قم فأنذر وربك فكبر وثيابك فطهر}