Reports on the heart

Sayyiduna Uthman Ghani (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "When Allah Almighty intends to make the heart of a servant deviate, Allah Almighty blinds him to the ways and means."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Muhammad bin Isa al-Tarsusi, who is da'if (weak).

Sayyidah Aishah Siddiqah (may Allah be pleased with her) narrates: Whenever the Prophet (peace and blessings be upon him) raised his head towards the sky, he would say: "O Turner of hearts, keep my heart firm upon Your obedience."
Ahmad recorded it; its chain contains Muslim bin Muhammad bin Za'idah. Some have said: the correct name is Salih bin Muhammad bin Za'idah. Ahmad declared him thiqah (trustworthy), while most people declared him da'if (weak). The rest of its narrators are the narrators of the Sahih.

Sayyidah Aishah Siddiqah (may Allah be pleased with her) narrates: The Prophet (peace and blessings be upon him) used to supplicate: "O Turner of hearts, keep my heart firm upon Your religion." Sayyidah Aishah (may Allah be pleased with her) narrates: I said: "O Messenger of Allah, may my father and mother be sacrificed for you, do you also fear, even though you are the Messenger of Allah?" The Prophet (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. Whomever He wishes to turn from misguidance to guidance, or from guidance to misguidance, He does so."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains al-Ala' bin al-Fadl. Ibn Adi said: some of what he narrates is munkar (objectionable). The remaining narrators of this report have been declared trustworthy, though there is disagreement about them.

Sayyidah Umm Salamah (may Allah be pleased with her) narrates: The Prophet (peace and blessings be upon him) would often say in his supplication: "O Allah, O Turner of hearts, keep my heart firm upon Your religion." Sayyidah Umm Salamah (may Allah be pleased with her) narrates: I said: "O Messenger of Allah, do hearts really change?" The Prophet (peace and blessings be upon him) said: "Yes! There is no human being among the creation of Allah Almighty, of the children of Adam, except that his heart is between two of the fingers of Allah Almighty. If Allah Almighty wills, He keeps it upright, and if He wills, He makes it deviate. So we ask Allah Almighty not to make our hearts deviate after He has guided us, and we ask Him to grant us mercy from Himself; indeed He is the Bestower." After this the narrator mentioned the full hadith, part of which al-Tirmidhi has also narrated.
Ahmad recorded it; its chain contains Shahr bin Hawshab, who has been declared trustworthy, though there is weakness in him.

Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "The heart of the son of Adam is between two of the fingers of the Most Merciful."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Abdullah bin Salih, whom Abd al-Malik bin Shu'ayb declared thiqah (trustworthy), while others declared him da'if (weak).

Sayyiduna Nu'aym bin Hammar al-Ghatafani (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) say: "The heart of every human being is between two of the fingers of the Most Merciful. If Allah Almighty wishes to make it deviate, He makes it deviate, and if He wishes to keep it upright, He keeps it upright. Every day the Scale is in the Hand of Allah Almighty; He raises some peoples and lowers others, and so it will be until the Day of Resurrection."
Al-Tabarani recorded it, and its narrators are thiqat (trustworthy).

Sayyiduna Samurah bin Fatik al-Asadi (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "The Scale (that is, the balance) is in the Hand of Allah Almighty; He raises some people and lowers others. And the heart of the son of Adam is between two of the fingers of the Most Merciful: if He wills, He makes it deviate, and if He wills, He keeps it upright."
Al-Tabarani recorded it, and its narrators are thiqat (trustworthy).

Sayyiduna al-Miqdad bin al-Aswad (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) say: "The heart of the son of Adam changes more swiftly than a cooking pot when it is at full boil (that is, about to boil over)."
Al-Tabarani recorded it with several chains, one of which has narrators who are thiqat (trustworthy).