Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:4065 – ʿUbayd b. Ghannām > Abū Bakr b. Abū Shaybah > ʿAbd al-Raḥīm b. Sulaymān > Wāṣil b. al-Sāʾib > Abū Sawrah > Abū Ayyūb

"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." (Using translation from Ibn Mājah 3707)  

الطبراني:٤٠٦٥ – حَدَّثَنَا عُبَيْدُ بْنُ غَنَّامٍ ثنا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ثنا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ عَنْ وَاصِلِ بْنِ السَّائِبِ عَنْ أَبِي سَوْرَةَ عَنْ أَبِي أَيُّوبَ قَالَ

قُلْنَا يَا رَسُولَ اللهِ هَذَا السَّلَامُ فَمَا الِاسْتِئْنَاسُ؟ قَالَ قَالَ «يَتَكَلَّمُ الرَّجُلُ تَسْبِيحَةً وَتَكْبِيرَةً وَتَحْمِيدَةً وَيَتَنَحْنَحُ يُؤْذِنُ أَهْلَ الْبَيْتِ»  

See similar narrations below:

Collected by Ibn Mājah, Suyūṭī
ibnmajah:3707 – Abū Bakr b. Abū Shaybah > ʿAbd al-Raḥīm b. Sulaymān > Wāṣil b. al-Sāʾib > Abū Sawrah > Abū Ayyūb al-Anṣārī

"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."  

ابن ماجة:٣٧٠٧ – حَدَّثَنَا 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  

suyuti:10078a –
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السيوطي:١٠٠٧٨a –

"الاستئناس يتكلَّم الرَّجلُ بتسبيحةٍ وتكبيرةٍ وتحميدةٍ، وَيَتَنَحْنَحُ يُؤذِنُ أهلَ البيت".  

[هـ] ابن ماجة [طب] الطبرانى في الكبير عن أَبي أيوب
suyuti:27718a –
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السيوطي:٢٧٧١٨a –

"يَتَكَلَّمُ الرَّجُلُ بَتَسْبِيحَةٍ وَتَكْبِيرَةٍ وَتَحْمِيدَةٍ، وَيَتَنَحْنَحُ وَيُؤْذِنُ أَهْلَ الْبَيْتِ".  

[هـ] ابن ماجة عن أَبى أيوب، قال: قلنا: يا رسول اللَّه: ما الاستئْناسُ؟ قال: فذكره