It is reported that Abū Al-Dardā – Allāh be pleased with him – said:
You will never be pious (a person of taqwā) until you become knowledgeable, and you will never be beautiful with your knowledge until you act [by it].

Ibn Ábd Al-Barr, Jāmi’ Bayān Al-‘Ilm wa Faḍlihī article 1239.