كتاب البر والصلة والآداب
45  
The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
(3)
Chapter: The Disgrace Of One Whose Parents, One Or Both Of Them, Reach Old Age During His Lifetime, And He Does Not Enter Paradise
(3)
باب رَغِمَ أَنْفُ مَنْ أَدْرَكَ أَبَوَيْهِ أَوْ أَحَدَهُمَا عِنْدَ الْكِبَرِ فَلَمْ يَدْخُلِ الْجَنَّةَ ‏
Sahih Muslim 2551 a

Abu Huraira reported Allah's Apostle (ﷺ) as saying:

Let him be humbled into dust; let him be humbled into dust. It was said: Allah's Messenger, who is he? He said: He who sees either of his parents during their old age or he sees both of them, but he does not enter Paradise.
حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏"‏ رَغِمَ أَنْفُ ثُمَّ رَغِمَ أَنْفُ ثُمَّ رَغِمَ أَنْفُ ‏"‏ ‏.‏ قِيلَ مَنْ يَا رَسُولَ اللَّهِ قَالَ ‏"‏ مَنْ أَدْرَكَ أَبَوَيْهِ عِنْدَ الْكِبَرِ أَحَدَهُمَا أَوْ كِلَيْهِمَا فَلَمْ يَدْخُلِ الْجَنَّةَ ‏"‏ ‏.‏
Reference : Sahih Muslim 2551a
In-book reference : Book 45, Hadith 10
USC-MSA web (English) reference : Book 32, Hadith 6189
  (deprecated numbering scheme)