Reference: al-Fawaa.id al-Jaliyyah min Duroos ash-Shaykh Ibn Baaz al-‘Ilmiyyah – Page 37
The flawless heart is free from associating partners in worship with Allaah, and free from innovations [in the religion of Islaam], and free from any opposition to the commandments [of Allaah (‘Azza wa Jall) and His Messenger ﷺ].
