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:505Yaḥyá b. Ḥassān > ʿAbd al-ʿAzīz b. Muslim > ʿAbdullāh b. Dīnār > Katab ʿUmar b. ʿAbd al-ʿAzīz > Ahl al-Madīnah

[Machine] "Look at the sayings of the Messenger of Allah ﷺ and write them down, as I fear the loss of knowledge and the departure of its people."  

الدارمي:٥٠٥حَدَّثَنَا يَحْيَى بْنُ حَسَّانَ حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُسْلِمٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ قَالَ «كَتَبَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ إِلَى أَهْلِ الْمَدِينَةِ

أَنْ انْظُرُوا حَدِيثَ رَسُولِ اللَّهِ ﷺ فَاكْتُبُوهُ فَإِنِّي قَدْ خِفْتُ دُرُوسَ الْعِلْمِ وَذَهَابَ أَهْلِهِ»