كتاب الإيمان
1
The Book of Faith
(80)
Chapter: Affirming that the believers will see their Lord, Glorious is he and most high, in the hereafter
(80)
باب إِثْبَاتِ رُؤْيَةِ الْمُؤْمِنِينَ فِي الآخِرَةِ رَبَّهُمْ سُبْحَانَهُ وَتَعَالَى ‏‏
Sahih Muslim 181 a

Suhaib reported the Apostle (ﷺ) saying:

When those deserving of Paradise would enter Paradise, the Blessed and the Exalted would ask: Do you wish Me to give you anything more? They would say: Hast Thou not brightened our faces? Hast Thou not made us enter Paradise and saved us from Fire? He (the narrator) said: He (God) would lift the veil, and of things given to them nothing would he dearer to them than the sight of their Lord, the Mighty and the Glorious.
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ بْنِ مَيْسَرَةَ، قَالَ حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ ثَابِتٍ الْبُنَانِيِّ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ صُهَيْبٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ إِذَا دَخَلَ أَهْلُ الْجَنَّةِ الْجَنَّةَ - قَالَ - يَقُولُ اللَّهُ تَبَارَكَ وَتَعَالَى تُرِيدُونَ شَيْئًا أَزِيدُكُمْ فَيَقُولُونَ أَلَمْ تُبَيِّضْ وُجُوهَنَا أَلَمْ تُدْخِلْنَا الْجَنَّةَ وَتُنَجِّنَا مِنَ النَّارِ - قَالَ - فَيَكْشِفُ الْحِجَابَ فَمَا أُعْطُوا شَيْئًا أَحَبَّ إِلَيْهِمْ مِنَ النَّظَرِ إِلَى رَبِّهِمْ عَزَّ وَجَلَّ ‏"‏ ‏.‏
Reference : Sahih Muslim 181 a
In-book reference : Book 1, Hadith 356
USC-MSA web (English) reference : Book 1, Hadith 347
  (deprecated numbering scheme)