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:507ʿUbaydullāh b. ʿAbd al-Majīd > Sawādah b. Ḥayyān > Muʿāwiyah b. Qurrah Abū Iyās

[Machine] It is said, "Whoever does not write their knowledge, their knowledge is not considered knowledge."  

الدارمي:٥٠٧أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ عَبْدِ الْمَجِيدِ حَدَّثَنَا سَوَادَةُ بْنُ حَيَّانَ قَالَ سَمِعْتُ مُعَاوِيَةَ بْنَ قُرَّةَ أَبَا إِيَاسٍ يَقُولُ كَانَ

يُقَالُ «مَنْ لَمْ يَكْتُبْ عِلْمَهُ لَمْ يُعَدَّ عِلْمُهُ عِلْمًا»