Abbas bin Abdul-Muttalib reported that he heard the Messenger of Allah ﷺ say, "Whoever is content with Allah as Lord, with Islam as religion, and with Muhammad as Prophet has tasted the sweetness of faith."
أنه سمع رسول الله ﷺ يقول: ذاق طعم الإيمان من رضي بالله ربا وبالإسلام دينا، وبمحمد.
Muslim narrated it in the Book of Faith (34) through several routes from Abdul-Aziz bin Muhammad Darawardi, from Yazid bin Had, from Muhammad bin Ibrahim, from Amir bin Saad, from Abbas bin Abdul-Muttalib, who then related the hadith.