Narrated 'Ikrimah:
that Ibn 'Abbas said: "Muhammad saw his Lord." I said: "Did Allah not say: No vision can grasp Him, but He grasps all vision (6:103). He said: "Woe unto you! That is when He manifests His Light. But Muhammad saw his Lord two times." (PT)
English reference (PT): Vol. 5, Book 44, Hadith 3279 (PT)
Arabic reference (PT): Book 47, Hadith 3590 (PT)