Ṣaḥīḥ al-Bukhārī & Ṣaḥīḥ Muslim

‘Ā’ishah (may Allah be pleased with her) reported: I asked the Prophet (may Allah's peace and blessings be upon him): "Have you ever experienced a day harder than the day of (the battle of) Uhud?" He replied: "Indeed, I have suffered a lot at the hands of your people (i.e., the disbelievers from of the Quraysh Tribe), the harshest of which was what they did to me on the Day of Al-‘Aqabah when I went to Ibn ‘Abd Yalīl ibn ‘Abd Kulāl with the purpose of inviting him to Islam, but he made no response (to my call).

So I departed with deep distress (to the point that I did not know where I was going). I did not recover until I arrived at Qarn Ath-Tha‘ālib. There, I raised my head and saw a cloud shading me. I looked and, lo and behold, I saw in it Jibrīl (peace be upon him) who called me and said: Indeed, Allah, the Exalted, heard what your people said to you and the response they gave you. He has sent to you the angel in charge of mountains to order him to do whatever you wish concerning them.

Then the angel of the mountains called me, greeted me and said: O Muhammad, Allah has listened to what your people had said to you. I am the angel of mountains, and my Lord has sent me to you so that you may give me your orders concerning them. If you wish I would bring together the Akhshabayn (two mountains that stand opposite to each other at the outskirts of Makkah) to crush them in between."