Sahih Muslim , Book 1, Hadith 343 (In-Book) ⓘ
It is narrated on the authority of Ibn 'Abbas that he (the Holy Prophet) saw (Allah) with, his heart.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصٌ، عَنْ عَبْدِ الْمَلِكِ، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ رَآهُ بِقَلْبِهِ .
also referenced under: Hadith 176 (Reference) & Book 1, Hadith 334 (USC-MSA)