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
ahmad-zuhd:1737 – ʿAbdullāh from my father > Muḥammad b. ʿUbaydullāh > Sufyān > ʿUmar b. ʿAbd al-ʿAzīz

[Machine] "Whoever acts without knowledge, his mischief surpasses his benefits."  

الزهد لأحمد:١٧٣٧ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنِي أَبِي حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدِ اللَّهِ حَدَّثَنَا سُفْيَانُ عَنْ عُمَرَ بْنِ عَبْدِ الْعَزِيزِ قَالَ

«مَنْ عَمِلَ بِغَيْرِ عِلْمٍ كَانَ مَا يُفْسِدُ أَكْثَرَ مِمَّا يُصْلِحُ»  

See similar narrations below:

Collected by Aḥmad's Zuhd
ahmad-zuhd:1667 – ʿAbdullāh > al-Ḥasan b. ʿAbd al-ʿAzīz b. Abū Salamah > al-Ḥasan

[Machine] "We asked for this matter and we looked, but we did not find anyone who carried out an action without knowledge, except that it caused more harm than good."  

الزهد لأحمد:١٦٦٧ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا الْحَسَنُ بْنُ عَبْدِ الْعَزِيزِ بْنِ أَبِي سَلَمَةَ عَنِ الْحَسَنِ قَالَ

«طَلَبْنَا هَذَا الْأَمْرَ وَنَظَرْنَا فَلَمْ نَجِدْ أَحَدًا عَمِلَ عَمَلًا بِغَيْرِ عِلْمٍ إِلَّا كَانَ مَا يُفْسِدُ أَكْثَرَ مِمَّا يُصْلِحُ»