لا تحتقروا أنفسكم لحداثة أسنانكم؛ فإن عمر بن الخطاب كان إذا نزل به الأمر المعضل دعا الفتيان فاستشارهم يتبع حدة عقولهم

Do not think too little of yourselves because you are young, for when ‘Umar ibn al-Khaṭṭāb was faced with a difficult problem, he would call the young people and seek their advice, relying on the sharpness of their minds.

—Ibn Shihāb al-Zuhrī [d. 124H/741CE] to his young students

from Dr. ‘Ali Muhammad al-Sallabi, ‘Umar: His Life and Times. International Islamic Publishing House. 2002.