Hadithcore
Sahih Muslim, 174 b
sahih

Al-Shaibani narrated on the authority of Zirr who narrated it on this authority of Abdullah that the (words of Allah):

" The heart belied not what he saw" (al Qur'an, Iiii. 11) imply that he saw Gabriel (peace be upon him) and he had six hundred wings.

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنِ الشَّيْبَانِيِّ، عَنْ زِرٍّ، عَنْ عَبْدِ اللَّهِ، قَالَ ‏{‏ مَا كَذَبَ الْفُؤَادُ مَا رَأَى‏}‏ قَالَ رَأَى جِبْرِيلَ - عَلَيْهِ السَّلاَمُ - لَهُ سِتُّمِائَةِ جَنَاحٍ ‏.‏

References2 variants
In-Book Reference
Book 1, Hadith 338
USC-MSA web (English) reference
Book 1, Hadith 331 (deprecated numbering scheme)