عَنْ أَبِی بَصِیرٍ قَالَ سَمِعْتُ أَبَا عَبْدِ اللّهِ (علیه السلام) : یَقُولُ اکْتُبُوا فَإِنّکُمْ لَا تَحْفَظُونَ حَتّى تَکْتُبُوا
Hazrat Imam Ja’far al-Sadiq [a.s] said;
Do your efforts to write (religious truths), because you cannot read by your hearts and preserve them unless you write down them
کافی، ج1،ص67