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
tirmidhi:2622 – Qutaybah > Bishr b. al-Mufaḍḍal > al-Jurayrī > ʿAbdullāh b. Shaqīq al-ʿUqaylī

The Companions of Muhammad ﷺ didn't consider leaving anything to be disblief except for the Salat.  

الترمذي:٢٦٢٢ – حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ عَنِ الْجُرَيْرِيِّ عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ الْعُقَيْلِيِّ قَالَ

كَانَ أَصْحَابُ مُحَمَّدٍ ﷺ لاَ يَرَوْنَ شَيْئًا مِنَ الأَعْمَالِ تَرْكُهُ كُفْرٌ غَيْرَ الصَّلاَةِ  

قَالَ أَبُو عِيسَى سَمِعْتُ أَبَا مُصْعَبٍ الْمَدَنِيَّ يَقُولُ مَنْ قَالَ الإِيمَانُ قَوْلٌ يُسْتَتَابُ فَإِنْ تَابَ وَإِلاَّ ضُرِبَتْ عُنُقُهُ

See similar narrations below:

Collected by Ḥākim
hakim:12 – Aḥmad b. Sahl al-Faqīh Bibukhārá > Qays b. Unayf > Qutaybah b. Saʿīd > Bishr b. al-Mufaḍḍal > al-Jurayrī > ʿAbdullāh b. Shaqīq > Abū Hurayrah

[Machine] "The companions of the Messenger of Allah (pbuh) did not consider any act, except for prayer, to be a form of disbelief."  

الحاكم:١٢ – أَخْبَرَنَا أَحْمَدُ بْنُ سَهْلٍ الْفَقِيهُ بِبُخَارَى حَدَّثَنَا قَيْسُ بْنُ أُنَيْفٍ حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ عَنِ الْجُرَيْرِيِّ عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ عَنْ أَبِي هُرَيْرَةَ قَالَ

«كَانَ أَصْحَابُ رَسُولِ اللَّهِ ﷺ لَا يَرَوْنَ شَيْئًا مِنَ الْأَعْمَالِ تَرْكُهُ كُفْرًا غَيْرَ الصَّلَاةِ» لم يتكلم عليه وإسناده صالح