" Certainly he saw of the greatest signs of Allah" (al-Qur'an, liii. 18) imply that he saw Gabriel in his (original) form and he had six hundred wings.
{ لَقَدْ رَأَى مِنْ آيَاتِ رَبِّهِ الْكُبْرَى} قَالَ رَأَى جِبْرِيلَ فِي صُورَتِهِ لَهُ سِتُّمِائَةِ جَنَاحٍ
[Machine] "Regarding this verse, 'Indeed, He has seen of the greatest signs of his Lord,' Abdullah said: 'He saw Jibril in his true form with six hundred wings.'"
عَنْ هَذِهِ الْآيَةِ {لَقَدْ رَأَى مِنْ آيَاتِ رَبِّهِ الْكُبْرَى} قَالَ قَالَ عَبْدُ اللَّهِ «رَأَى جِبْرِيلَ فِي صُورَتِهِ لَهُ سِتُّ مِائَةِ جَنَاحٍ»
[Machine] In his saying, "{Indeed, he (Muhammad) saw of the greatest signs of his Lord]," he said, "Muhammad ﷺ saw Gabriel in his true form, with six hundred wings, and not one wing but it filled the space between the east and the west."
فِي قَوْلِهِ {§لَقَدْ رَأَى مِنْ آيَاتِ رَبِّهِ الْكُبْرَى} قَالَ «رَأَى مُحَمَّدٌ ﷺ جِبْرِيلَ فِي صُورَتِهِ لَهُ سِتُّ مِائَةِ جَنَاحٍ مَا مِنْهَا جَنَاحٌ إِلَّا قَدْ سَدَّ مَا بَيْنَ الْمَشْرِقِ وَالْمَغْرِبِ»
[Machine] "Regarding the statement of Abdullah, 'Indeed he has seen the greatest signs of his Lord,' he said, 'He has six hundred wings.'"
عَنْ عَبْدِ اللهِ فِي قَوْلِهِ {لَقَدْ رَأَى مِنْ آيَاتِ رَبِّهِ الْكُبْرَى} قَالَ «لَهُ سِتُّ مِائَةِ جَنَاحٍ»