Al-Kāfi - Volume 1 > Chapter on the Qualities of the Scholars
Hadith #1

1ـ مُحَمَّدُ بْنُ يَحْيَى الْعَطَّارُ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الْحَسَنِ بْنِ مَحْبُوبٍ عَنْ مُعَاوِيَةَ بْنِ وَهْبٍ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلام) يَقُولُ اطْلُبُوا الْعِلْمَ وَتَزَيَّنُوا مَعَهُ بِالْحِلْمِ وَالْوَقَارِ وَتَوَاضَعُوا لِمَنْ تُعَلِّمُونَهُ الْعِلْمَ وَتَوَاضَعُوا لِمَنْ طَلَبْتُمْ مِنْهُ الْعِلْمَ وَلا تَكُونُوا عُلَمَاءَ جَبَّارِينَ فَيَذْهَبَ بَاطِلُكُمْ بِحَقِّكُمْ.

1. Muhammad ibn Yahya al-‘Attar from Ahmad ibn Muhammad ibn ‘Isa from al-Hassan ibn Mahbub from Mu‘awiya ibn Wahab who has said the following. “Imam abu ‘Abdallah (a.s.) has said. “Seek knowledge and beautify it with forbearance and dignity. Be humble to your students and to those from whom you learn. Do not be a tyrant scholar lest your falsehood would destroy the truth in you.”