(76) باب فِي ذِكْرِ سِدْرَةِ الْمُنْتَهَى
Zirr b. Hubaish narrated it on the authority of 'Abdullah (that the words of Allah):
" 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.
Reference: Sahih Muslim 174 c
In-book reference: Book 1, Hadith 341
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 332