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
darimi:438 – Abū ʿĀṣim > Lā Adrī Samiʿtuh Minh or Lāb. ʿAwn > Muḥammad

[Machine] "I do not know if I heard it from him or from Ibn 'Awn about Muhammad, 'Indeed, this knowledge is a religion, so be careful who you take your religion from.'"  

الدارمي:٤٣٨ – أَخْبَرَنَا أَبُو عَاصِمٍ قَالَ

لَا أَدْرِي سَمِعْتُهُ مِنْهُ أَوْ لابْنُ عَوْنٍ عَنْ مُحَمَّدٍ «إِنَّ هَذَا الْعِلْمَ دِينٌ فَانْظُرُوا عَمَّنْ تَأْخُذُونَ دِينَكُمْ»  

See similar narrations below:

Collected by Muslim

Be careful where you get your religion from

muslim:i018 – Ḥasan b. al-Rabīʿ > Ḥammād b. Zayd > Ayyūb And Hishām > Muḥammad > Fuḍayl > Hishām > Makhlad b. Ḥusayn > Hishām > Muḥammad b. Sīrīn

‘Indeed this knowledge is faith, so carefully consider from whom you take your faith’.  

مسلم:i٠١٨ – حَدَّثَنَا حَسَنُ بْنُ الرَّبِيعِ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ عَنْ أَيُّوبَ وَهِشَامٍ عَنْ مُحَمَّدٍ وَحَدَّثَنَا فُضَيْلٌ عَنْ هِشَامٍ قَالَ وَحَدَّثَنَا مَخْلَدُ بْنُ حُسَيْنٍ عَنْ هِشَامٍ عَنْ مُحَمَّدِ بْنِ سِيرِينَ قَالَ

إِنَّ هَذَا الْعِلْمَ دِينٌ فَانْظُرُوا عَمَّنْ تَأْخُذُونَ دِينَكُمْ