(77) باب مَعْنَى قَوْلِ اللَّهِ عَزَّ وَجَلَّ: {وَلَقَدْ رَآهُ نَزْلَةً أُخْرَى} وَهَلْ رَأَى النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَبَّهُ لَيْلَةَ الإِسْرَاءِ
It is narrated on the authority of Ibn 'Abbas that he (the Holy Prophet) saw (Allah) with, his heart.
Reference: Sahih Muslim 176 a
In-book reference: Book 1, Hadith 343
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 334