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.
darimi:508Muslim b. Ibrāhīm > ʿAbdullāh b. al-Muthanná > Thumāmah b. ʿAbdullāh b. Anas

[Machine] Anas used to say to his sons, "O my sons, document this knowledge."  

الدارمي:٥٠٨أَخْبَرَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْمُثَنَّى حَدَّثَنِي ثُمَامَةُ بْنُ عَبْدِ اللَّهِ بْنِ أَنَسٍ

أَنَّ أَنَسًا كَانَ يَقُولُ لِبَنِيهِ «يَا بَنِيَّ قَيِّدُوا هَذَا الْعِلْمَ»