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 Bukhari, Volume 6, Book60, Number 379