Learn knowledge, and learn calmness and forbearance for the sake of knowledge. Humble yourselves to those whom you teach, and let those whom you teach humble themselves to you. Do not be tyrannical people of knowledge, lest your knowledge not spread because of your ignorance.

—‘Umar ibn al-Khaṭṭāb [d. 23H/644CE]

(Read on pg 51, Imam Abu Baker Muhammad b. al-Husayn al-Ajurri, The Character of the Bearers and People of the Qur’an. Al-Quran Society. London:2002.)