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:4875 – Muḥammad b. ʿAbdullāh b. ʿAbd al-Ḥakam > Abū And Shuʿayb b. al-Layth > al-Layth > ʿUbaydullāh b. Abū Jaʿfar > ʿUrwah > Abū Murāwiḥ > Abū Dhar

[Machine] He asked the Prophet ﷺ, "Which action is best?" He replied, "Faith in Allah and striving in the cause of Allah." He then asked, "Which slaves are best?" He said, "The most expensive of them and the dearest to their families."  

الكبرى للنسائي:٤٨٧٥ – أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللهِ بْنِ عَبْدِ الْحَكَمِ قَالَ حَدَّثَنَا أَبِي وَشُعَيْبُ بْنُ اللَّيْثِ عَنِ اللَّيْثِ عَنْ عُبَيْدِ اللهِ بْنِ أَبِي جَعْفَرٍ قَالَ أَخْبَرَنِي عُرْوَةُ عَنْ أَبِي مُرَاوِحٍ عَنْ أَبِي ذَرٍّ

أَنَّهُ سَأَلَ نَبِيَّ اللهِ ﷺ أَيُّ الْعَمَلِ خَيْرٌ؟ قَالَ «إِيمَانٌ بِاللهِ وَجِهَادٌ فِي سَبِيلِ اللهِ» قَالَ فَأَيُّ الرِّقَابِ خَيْرٌ؟ قَالَ «أَغْلَاهَا ثَمَنًا وَأَنْفَسُهَا عِنْدَ أَهْلِهَا»  

See similar narrations below:

Collected by Nasāʾī, Nasāʾī's Kubrá
nasai:3129 – Muḥammad b. ʿAbdullāh b. ʿAbd al-Ḥakam > Shuʿayb > al-Layth > ʿUbaydullāh b. Abū Jaʿfar > ʿUrwah > Abū Murāwiḥ > Abū Dhar

"Belief in Allah and Jihad in the cause of Allah, the Mighty and Sublime."  

النسائي:٣١٢٩ – أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ عَبْدِ الْحَكَمِ عَنْ شُعَيْبٍ عَنِ اللَّيْثِ عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ قَالَ أَخْبَرَنِي عُرْوَةُ عَنْ أَبِي مُرَاوِحٍ عَنْ أَبِي ذَرٍّ

أَنَّهُ سَأَلَ نَبِيَّ اللَّهِ ﷺ أَىُّ الْعَمَلِ خَيْرٌ قَالَ إِيمَانٌ بِاللَّهِ وَجِهَادٌ فِي سَبِيلِ اللَّهِ ﷻ  

nasai-kubra:4874 – ʿUbaydullāh b. Saʿīd > Yaḥyá > Hishām from my father > Abū Murāwiḥ > Abū Dhar

[Machine] He informed him that he said: "O Messenger of Allah, which deed is best?" He said: "Belief in Allah and Jihad in His cause." He said: "Which slaves are best?" He said: "The most expensive and valuable among them to their owners."  

الكبرى للنسائي:٤٨٧٤ – أَخْبَرَنَا عُبَيْدُ اللهِ بْنُ سَعِيدٍ قَالَ حَدَّثَنَا يَحْيَى عَنْ هِشَامٍ قَالَ حَدَّثَنِي أَبِي عَنْ أَبِي مُرَاوِحٍ أَنَّ أَبَا ذَرٍّ

أَخْبَرَهُ أَنَّهُ قَالَ يَا رَسُولَ اللهِ أَيُّ الْعَمَلِ أَفْضَلُ قَالَ «إِيمَانٌ بِاللهِ وَجِهَادٌ فِي سَبِيلِهِ» قَالَ فَأَيُّ الرِّقَابِ أَفْضَلُ؟ قَالَ «أَغْلَاهَا ثَمَنًا وَأَنْفَسُهَا عِنْدَ أَهْلِهَا»