Sahih al-Bukhari 3291
صحيح البخاري#3291Sahihحَدَّثَنَا الْحَسَنُ بْنُ الرَّبِيعِ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ أَشْعَثَ، عَنْ أَبِيهِ، عَنْ مَسْرُوقٍ، قَالَ قَالَتْ عَائِشَةُ ـ رضى الله عنها ـ سَأَلْتُ النَّبِيَّ صلى الله عليه وسلم عَنِ الْتِفَاتِ الرَّجُلِ فِي الصَّلاَةِ. فَقَالَ " هُوَ اخْتِلاَسٌ يَخْتَلِسُ الشَّيْطَانُ مِنْ صَلاَةِ أَحَدِكُمْ ".
Narrated `Aisha:I asked the Prophet (ﷺ) about one's looking here and there during the prayer. He replied, "It is what Satan steals from the prayer of any one of you
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: 59:100