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
nasai-kubra:10902 – Maḥmūd b. Khālid > al-Walīd > Abū Muḥammad ʿĪsá b. Mūsá And Ghayruh > Ismāʿīl b. ʿUbaydullāh > Qays b. al-Ḥārith al-Madhḥijī > ʿUbādah b. al-Ṣāmit

[Machine] I heard the Messenger of Allah ﷺ saying, "Whoever dies without associating anything with Allah, Allah has made Paradise forbidden for him."  

الكبرى للنسائي:١٠٩٠٢ – أَخْبَرَنِي مَحْمُودُ بْنُ خَالِدٍ قَالَ حَدَّثَنَا الْوَلِيدُ قَالَ أَخْبَرَنِي أَبُو مُحَمَّدٍ عِيسَى بْنُ مُوسَى وَغَيْرُهُ قَالُوا أَخْبَرَنَا إِسْمَاعِيلُ بْنُ عُبَيْدِ اللهِ أَنَّ قَيْسَ بْنَ الْحَارِثِ الْمَذْحِجِيَّ حَدَّثَهُ أَنَّ عُبَادَةَ بْنَ الصَّامِتِ قَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَنْ مَاتَ لَا يُشْرِكُ بِاللهِ شَيْئًا فَقَدْ حَرَّمَ اللهُ عَلَيْهِ النَّارَ»  

See similar narrations below:

Collected by Suyūṭī