Sahih al-Bukhari 506
صحيح البخاري#506Sahihحَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، قَالَ حَدَّثَنَا أَبُو ضَمْرَةَ، قَالَ حَدَّثَنَا مُوسَى بْنُ عُقْبَةَ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ، كَانَ إِذَا دَخَلَ الْكَعْبَةَ مَشَى قِبَلَ وَجْهِهِ حِينَ يَدْخُلُ، وَجَعَلَ الْبَابَ قِبَلَ ظَهْرِهِ، فَمَشَى حَتَّى يَكُونَ بَيْنَهُ وَبَيْنَ الْجِدَارِ الَّذِي قِبَلَ وَجْهِهِ قَرِيبًا مِنْ ثَلاَثَةِ أَذْرُعٍ، صَلَّى يَتَوَخَّى الْمَكَانَ الَّذِي أَخْبَرَهُ بِهِ بِلاَلٌ أَنَّ النَّبِيَّ صلى الله عليه وسلم صَلَّى فِيهِ. قَالَ وَلَيْسَ عَلَى أَحَدِنَا بَأْسٌ إِنْ صَلَّى فِي أَىِّ نَوَاحِي الْبَيْتِ شَاءَ.
Narrated Nafi':Whenever 'Abdullah entered the Ka'bah, he used to go ahead leaving the door of the Ka'bah behind him. He would proceed on till the remaining distance between him and the opposite wall was about three cubits. Then he would offer prayer there where the Prophet (ﷺ) had offered Salat, as Bilal informed me. Ibn 'Umar said, "It does not matter for any of us to offer prayers at any place inside the Ka'bah
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 8:153