Sunan Ibn Majah 3707
سنن ابن ماجه#3707Da'ifحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ، عَنْ وَاصِلِ بْنِ السَّائِبِ، عَنْ أَبِي سَوْرَةَ، عَنْ أَبِي أَيُّوبَ الأَنْصَارِيِّ، قَالَ قُلْنَا يَا رَسُولَ اللَّهِ هَذَا السَّلاَمُ فَمَا الاِسْتِئْنَاسُ قَالَ " يَتَكَلَّمُ الرَّجُلُ تَسْبِيحَةً وَتَكْبِيرَةً وَتَحْمِيدَةً وَيَتَنَحْنَحُ وَيُؤْذِنُ أَهْلَ الْبَيْتِ " .
It was narrated that Abu Ayyub Ansari said:"We said: 'O Messenger of Allah(ﷺ), (we know) this (greeting of) Salam, but what does seeking permission to enter mean?' He said: 'It means a man saying SubhanAllah, and Allahu Akbar and Al Hamdulillah, and clearing his throat, announcing his arrival to the people in the house
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:
In-book reference: 33:51