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
bayhaqi:5417 – Abū Bakr b. al-Ḥārith al-Faqīh > Abū Muḥammad b. Ḥayyān al-Aṣbahānī > Ibn Manīʿ > Abū al-Rabīʿ al-Zahrānī > ʿAbd al-Wārith > Abū al-Tayyāḥ > Muwarriq al-ʿIjlī > Ṣafwān b. Muḥriz > Saʾalt Ibn ʿUmar > Ṣalāh al-Safar

[Machine] "Two raka'ahs (units of prayer) for whoever goes against the Sunnah (tradition), is a disbelief."  

البيهقي:٥٤١٧ – أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَارِثِ الْفَقِيهُ أنبأ أَبُو مُحَمَّدِ بْنُ حَيَّانَ الْأَصْبَهَانِيُّ ثنا ابْنُ مَنِيعٍ ثنا أَبُو الرَّبِيعِ الزَّهْرَانِيُّ ثنا عَبْدُ الْوَارِثِ ثنا أَبُو التَّيَّاحِ عَنْ مُوَرِّقٍ الْعِجْلِيِّ عَنْ صَفْوَانَ بْنِ مُحْرِزٍ قَالَ سَأَلْتُ ابْنَ عُمَرَ عَنْ صَلَاةِ السَّفَرِ قَالَ

رَكْعَتَانِ مَنْ خَالَفَ السُّنَّةَ كَفَرَ