Sahih al-Bukhari 1167
صحيح البخاري#1167Sahihحَدَّثَنَا الْمَكِّيُّ بْنُ إِبْرَاهِيمَ، عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدٍ، عَنْ عَامِرِ بْنِ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، عَنْ عَمْرِو بْنِ سُلَيْمٍ الزُّرَقِيِّ، سَمِعَ أَبَا قَتَادَةَ بْنَ رِبْعِيٍّ الأَنْصَارِيّ َ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " إِذَا دَخَلَ أَحَدُكُمُ الْمَسْجِدَ فَلاَ يَجْلِسْ حَتَّى يُصَلِّيَ رَكْعَتَيْنِ ".
Narrated Abu Qatada bin Rabi Al-Ansari:The Prophet (ﷺ) said, "If anyone of you enters a Mosque, he should not sit until he has offered a two-rak`at prayer
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: 19:46