It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Prophet (peace and blessings be upon him) used to supplicate: 'Ya muqallib al-qulub, thabbit qalbi ala dinik' (O Turner of hearts, keep my heart firm upon Your religion.)
Sayyidah Aishah (may Allah be pleased with her) said: I said: "May my father and mother be sacrificed for you, O Messenger of Allah! Do you too fear (your heart turning), when you are the Messenger of Allah?"
He (peace and blessings be upon him) said: "O Aishah! The hearts of the children of Adam are between two of the fingers of the Most Merciful; whoever's heart He wishes to turn from misguidance to guidance, or from guidance to misguidance, He turns it."
Imam al-Tabarani (may Allah have mercy on him) said: "No one other than al-Mu'alla bin al-Fadl (may Allah have mercy on him) narrated this hadith from Mubarak bin Fadalah (may Allah have mercy on him), and Ibrahim bin Bistam (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 1530
Hadith Gradingمحدثین:إسناده ضعيف، فيه العلاء بن الفضل
Hadith Takhrij«قال الهيثمي: فيه العلاء بن الفضل قال ابن عدي في بعض ما يرويه نكرة وبقية رجاله وثقوا وفيهم خلاف «مجمع الزوائد ومنبع الفوائد، ج 7، ص 210»» «أخرجه النسائي فى «السنن الكبرى» برقم: 7690، وأحمد فى «مسنده» برقم: 25243، 26774، وأبو يعلى فى «مسنده» برقم: 4669، وابن أبي شيبة فى «مصنفه» برقم: 29809، 31046»