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:7392 – Maḥmūd b. Muḥammad al-Wāsiṭī > ʿUmar b. Ṣāliḥ b. Jabīrah al-Wāsiṭī > Mushmaʿal b. Milḥān > ʿAṭāʾ b. ʿAjlān > ʿĀṣim b. Abū al-Najūd > Zir b. Ḥubaysh > Ṣafwān b. ʿAssāl > Baynā Naḥn ʿInd Rasūl Allāh Ṣallá

[Machine] While we were with the Messenger of Allah ﷺ , a man called the Adhan (Muslim call to prayer). The Prophet ﷺ said, "According to the Fitrah (natural disposition)." The man then said, "I testify that there is no god but Allah," so the Prophet ﷺ said, "He has testified to the truth." Then the man said, "I testify that Muhammad is the Messenger of Allah," to which the Prophet ﷺ said, "He has been saved from the Fire."  

الطبراني:٧٣٩٢ – حَدَّثَنَا مَحْمُودُ بْنُ مُحَمَّدٍ الْوَاسِطِيُّ ثنا عُمَرُ بْنُ صَالِحِ بْنِ جَبِيرَةَ الْوَاسِطِيُّ ثنا مُشْمَعَلُّ بْنُ مِلْحَانَ عَنْ عَطَاءِ بْنِ عَجْلَانَ عَنْ عَاصِمِ بْنِ أَبِي النَّجُودِ عَنْ زِرِّ بْنِ حُبَيْشٍ عَنْ صَفْوَانَ بْنِ عَسَّالٍ قَالَ

بَيْنَا نَحْنُ عِنْدَ رَسُولِ اللهِ ﷺ إِذْ سَمِعَ رَجُلًا يُؤَذِّنُ فَقَالَ النَّبِيُّ ﷺ «عَلَى الْفِطْرَةِ» فَقَالَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ فَقَالَ «شَهِدَ بِالْحَقِّ» قَالَ أَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللهِ قَالَ «خَرَجَ مِنَ النَّارِ»  

See similar narrations below:

Collected by Aḥmad, Ṭabarānī
ahmad:13532 – Muʾammal > Ḥammād > Thābit > Anas

[Machine] While we were with the Messenger of Allah ﷺ on a journey, we heard a man saying "Allahu Akbar, Allahu Akbar." The Prophet ﷺ said, "On the Fitrah (natural disposition)." Then he said, "I bear witness that there is no god but Allah and I bear witness that Muhammad is the Messenger of Allah." The Prophet ﷺ said, "This man has come out of the Fire."  

أحمد:١٣٥٣٢ – حَدَّثَنَا مُؤَمَّلٌ حَدَّثَنَا حَمَّادٌ حَدَّثَنَا ثَابِتٌ عَنْ أَنَسٍ قَالَ

بَيْنَمَا نَحْنُ مَعَ رَسُولِ اللهِ ﷺ فِي سَفَرٍ إِذْ سَمِعَ رَجُلًا يَقُولُ اللهُ أَكْبَرُ اللهُ أَكْبَرُ فَقَالَ النَّبِيُّ ﷺ عَلَى الْفِطْرَةِ فقَالَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللهِ فَقَالَ النَّبِيُّ ﷺ خَرَجَ هَذَا مِنَ النَّارِ  

tabarani:10063 – Muḥammad b. Yaḥyá b. al-Mundhir al-Qazzāz > Abū Zayd al-Naḥwī > Saʿīd b. Abū ʿArūbah > Qatādah > Abū al-Aḥwaṣ > ʿAbdullāh

[Machine] While the Messenger of Allah ﷺ was on one of his journeys, he heard a caller saying, "Allah is the Greatest, Allah is the Greatest." The Messenger of Allah ﷺ said, "Upon Fitrah (natural disposition)." Then he said, "I bear witness that there is no god but Allah." The Messenger of Allah ﷺ said, "He has come out of the Fire."  

الطبراني:١٠٠٦٣ – حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ الْمُنْذِرِ الْقَزَّازُ ثنا أَبُو زَيْدٍ النَّحْوِيُّ ثنا سَعِيدُ بْنُ أَبِي عَرُوبَةَ عَنْ قَتَادَةَ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ قَالَ

بَيْنَمَا رَسُولُ اللهِ ﷺ فِي بَعْضِ أَسْفَارِهِ إِذْ سَمِعَ مُنَادِيًا يَقُولُ اللهُ أَكْبَرُ اللهُ أَكْبَرُ فَقَالَ رَسُولُ اللهِ ﷺ «عَلَى الْفِطْرَةِ» فَقَالَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ فَقَالَ رَسُولُ اللهِ ﷺ «خَرَجَ مِنَ النَّارِ»