Prayer to Keep the Heart Firm on Religion
Prayers of Our ProphetFrom the section 'Examples from the Prayers of Our Prophet' in the book 'Prayers and Dhikr' by Mahmud Sami Ramazanoğlu
The most frequent prayer of the Prophet (pbuh): “O my Lord, the Changer of hearts! Make my heart firm upon Your religion.” (Ya muqallibal qulub thabbit qalbi 'ala dinik). (Tirmidhi, Da'awat, 85)