The angel Gabriel is the leader of all the angels and is called Aminul al-Wahyi.

He was assigned to deliver revelations to the apostles. Rasulullah SAW once met Jibril near Sidratul Muntaha, which is a large tree whose roots are in the sixth sky. Its leaves, fruit, and branches soar up to the seventh heaven.

It is narrated in the Book of Sahih Ibn Hiban, from a friend of Abdullah Ibn Mas’ud, the Messenger of Allah said: عن ابن مسعود -رضي الله عنه- أنه قال في هذه الآية: {ولقد رآه نَزْلَةً أُخرى} [النجم: 13]، قال رسول الله -صلى الله عليه وسلم-: رأيتُ جبريلَ عند سِدْرةِ المُنْتَهى، عليه ستُّمائة جَناح، يَنْتَثِرُ من رِيشِه التَّهاوِيلُ : ال الياقُوتُ

From Ibn Mas’ud RA that he said about this verse, “And indeed Muhammad saw Gabriel (in his original appearance) at another time.” (Surat an-Najm: 13) Rasulullah SAW said, “I saw Gabriel in Sidratul Muntaha, he had six hundred wings scattered on his feathers of diamonds and gems of different colors.”

in the hadith marfu ‘from Ibn Shihah, once the Prophet asked Jibril to reveal his true form. Then Gabriel said, “You will not be able to see me in my true form. You must be surprised.” However, the Messenger of Allah said he really wanted Jibril to reveal his true form.

“Then the Messenger of Allah went to the place of prayer one night when the moon was bright. Then Jibril came in his original form. When the angel Gabriel revealed his true form in front of him, the Messenger of Allah immediately fainted when he saw Jibril has 600 wings, very large, “

When the Prophet woke up from his stupor, Jibril then leaned on his body. He put one hand on the chest of the Prophet and the other hand was placed between his shoulders. The Messenger of Allah said, “Subhanallah, Glory be to Allah. I never thought that there was a creature that Allah created as big as you, O Jibril.”

Narrated Abu Ishaq-Ash-Shaibani:
I asked Zir bin Hubaish regarding the Statement of Allah: “And was at a distance Of but two bow-lengths Or (even) nearer; So did (Allah) convey The Inspiration to His slave (Gabriel) and then he (Gabriel) Conveyed (that to Muhammad).” (53.9-10) On that, Zir said, “Ibn Mas’ud informed us that the Prophet had seen Gabriel having 600 wings.” (Sahih al-Bukhari, Volume 4, Book 54, Number 455)

Narrated Abdullah:
Regarding the Verses: ‘And was at a distance of but two bow-lengths or (even) nearer; So did (Allah) convey the Inspiration to His slave (Gabriel) and then he (Gabriel) conveyed (that to Muhammad…)’ (53.9-10). Ibn Mas’ud narrated to us that the Prophet had seen Gabriel with six hundred wings. (Sahih al-Bukhari, Volume 6, Book 60, Number 379)

‘And was at a distance of but two bow-lengths or (even) nearer. So did Allah convey the Inspiration to His slave (Gabriel) and then he (Gabriel) conveyed that to Muhammad.’ (53.10) He said, “Abdullah (bin Mas’ud) informed us that Muhammad had seen Gabriel with six hundred wings.” (Sahih al-Bukhari, Volume 6, Book 60, Number 380)