عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ دَعَوَاتٌ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُكْثِرُ أَنْ يَدْعُوَ بِهَا يَا مُقَلِّبَ الْقُلُوبِ ثَبِّتْ قَلْبِي عَلَى دِينِكَ قَالَتْ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّكَ تُكْثِرُ تَدْعُو بِهَذَا الدُّعَاءِ فَقَالَ إِنَّ قَلْبَ الْآدَمِيِّ بَيْنَ أُصْبُعَيْنِ مِنْ أَصَابِعِ اللَّهِ عَزَّ وَجَلَّ فَإِذَا شَاءَ أَزَاغَهُ وَإِذَا شَاءَ أَقَامَهُ
It is narrated from Sayyida Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to frequently supplicate: "O Turner of the hearts, keep my heart firm upon Your religion." I said: O Messenger of Allah, you also frequently make this supplication. The Prophet (peace and blessings be upon him) said: Indeed, the heart of a person is between two fingers from among the fingers of Allah Almighty; if He wills, He turns it aside, and if He wills, He keeps it straight.