يَا مُقَلِّبَ الْقُلُوْبِ ثَبِّتْ قَلْبِيْ عَلَى دِيْنِكَ

Ya Muqallibal-qulubi, thabbit qalbi `alaa dinik

O Changer of the hearts, make my heart firm upon Your religion.

Reference: Sahih. Tirmidhi: 3522