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
bayhaqi:12184 – Abū Ṭāhir al-Faqīh > Abū ʿUthmān al-Baṣrī > Abū Aḥmad b. ʿAbd al-Wahhāb > Bishr b. al-Ḥakam > Sufyān b. ʿUyaynah > Innamā Qīl al-Farāʾiḍ Niṣf al-ʿIlm Liʾannah Yubtalá Bih al-Nās > al-Shaykh And Yudhkar

[Machine] From Tawus and Qatadah: "Al-faridah (obligatory duty) is one-third of knowledge."  

البيهقي:١٢١٨٤ – أَخْبَرَنَا أَبُو طَاهِرٍ الْفَقِيهُ أنا أَبُو عُثْمَانَ الْبَصْرِيُّ ثنا أَبُو أَحْمَدَ بْنُ عَبْدِ الْوَهَّابِ أَخْبَرَنِي بِشْرُ بْنُ الْحَكَمِ قَالَ سَمِعْتُ سُفْيَانَ بْنَ عُيَيْنَةَ يَقُولُ إِنَّمَا قِيلَ الْفَرَائِضُ نِصْفُ الْعِلْمِ؛ لِأَنَّهُ يُبْتَلَى بِهِ النَّاسُ كُلُّهُمْ قَالَ الشَّيْخُ وَيُذْكَرُ

عَنْ طَاوُسٍ وَقَتَادَةَ الْفَرِيضَةُ ثُلُثُ الْعِلْمِ