Mu'awiyah (May Allah be pleased with him) reported:
The Messenger of Allah said, "When Allah wishes good for someone, He bestows upon him the understanding of Deen." <b>[Al-Bukhari and Muslim]</b>.
وعن معاوية رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم :
من يرد الله به خيرًا يفقه في الدين
((متفق عليه))