[Machine] The Messenger of Allah ﷺ used to frequently say, "O Turner of hearts, keep my heart steadfast on your religion." So, I said, "O Messenger of Allah, why do you frequently make this supplication?" He replied, "O Umm Salamah, surely the heart of the son of Adam is between two fingers of the fingers of the Most Merciful. He turns it in the direction He wills."
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُكْثِرُ أَنْ يَقُولَ «يَا مُقَلِّبَ الْقُلُوبِ ثَبِّتْ قَلْبِي عَلَى دِينِكَ» فَقُلْتُ يَا رَسُولَ اللهِ مَا أَكْثَرَ مَا تَدْعُو بِهَذَا الدُّعَاءِ؟ فَقَالَ «يَا أُمَّ سَلَمَةَ إِنَّ قَلْبَ ابْنِ آدَمَ بَيْنَ أُصْبُعَيْنِ مِنْ أَصَابِعِ رَبِّ الْعَالَمِينَ إِذَا شَاءَ أَقَامَهُ وَإِذَا شَاءَ أَزَاغَهُ»