In order to be followed as an example, be a brother to your other Muslims.  Be a son to the elders, and a father to the younger ones.

—Al-Ḥasan al-Baṣrī [d 110H/728CE] to ‘Umar b. ‘Abd al-‘Azīz

(Read on pg 172, Al-Hafiz Jamaludeen Abi Al-Faraj and Abd Ar-Rahman bin Al-Jawzi and Al-Qurashi and Al-Baghdadi, The Biography and virtues of Omar bin Abd Al-Aziz: The Ascetic Caliph. Dar Al-Kotob Al-ilmiyah. Beirut:2001.)