Allah the Exalted states that the Message His servant and Messenger Muhammad brought to people was taught to him by,

﴿شَدِيدُ الْقُوَى﴾

(mighty in power), he is Jibril, peace be upon him,

﴿إِنَّهُ لَقَوْلُ رَسُولٍ كَرِيمٍ ذِى قُوَّةٍ عِندَ ذِى الْعَرْشِ مَكِينٍ مُّطَـعٍ ثَمَّ أَمِينٍ ﴾

(Verily, this is the Word a most honorable messenger, owner of power, with (Allah) the Lord of the Throne, obeyed (by the angels) and trustworthy.)(81:19-21) Allah said here,

﴿ذُو مِرَّةٍ﴾

(Dhu Mirrah), meaning, he is mighty in power, according to Mujahid, Al-Hasan and Ibn Zayd. In an authentic Hadith from `Abdullah bin `Umar and Abu Hurayrah, the Prophet said,

«لَا تَحِلُّ الصَّدَقَةُ لِغَنِيَ وَلَا لِذِي مِرَّةٍ سَوِي»

(Charity is not allowed for a rich person nor Dhu Mirrah (a strong person) of sound mind and body.) Allah said;

﴿فَاسْتَوَى﴾

(then he Istawa (rose).) this refers to the angel Jibril, according to Al-Hasan, Mujahid, Qatadah and Ar-Rabi` bin Anas,

﴿وَهُوَ بِالاٍّفُقِ الاٌّعْلَى ﴾

(While he was in the highest part of the horizon.) meaning, Jibril rose to the highest part of the horizon, according to `Ikrimah and several others; `Ikrimah said, "The highest horizon where the morning comes from.'' Mujahid said, "It is (the place of) sunrise.'' Qatadah said, "That from which the day comes.'' Ibn Zayd and several others said similarly. Imam Ahmad recorded that Abdullah bin Mas`ud said, "The Messenger of Allah saw Jibril in his original shape having six hundred wings, each wing filling the side of the horizon, with a colorful array, and pearls and rubies falling from each wing as much as only Allah knows.'' Only Imam Ahmad collected this Hadith. Imam Ahmad recorded that `Abdullah bin `Abbas said, "The Prophet asked Jibril to appear himself to him in his original shape and Jibril said to him, `Invoke your Lord.' The Prophet invoked his Lord the Exalted and Most Honored, and a great huge figure appeared to him from the east and kept rising and spreading. When the Prophet saw Jibril in his original shape, he was knocked unconscious. Jibril came down and revived the Prophet and wiped the saliva off of his cheeks.''' Only Ahmad collected this Hadith.