The Messenger of Allah ﷺ said, "The heart of the son of Adam is between two fingers of the fingers of the Most Merciful."
قال رسول الله ﷺ: إنما قلب ابن آدم بين أصبعين من أصابع الرحمن.
Ibn Abu Asim narrated it in As-Sunnah (229) from Umar bin Khattab, who said, Abu Salih narrated to us, who said, Layth narrated to us, who said, Yahya bin Saeed narrated to us, from Khalid bin Abu Imran, who said, Abu Ayyash narrated to me, from Abu Hurairah, and he related it.Its chain of transmission is hasan because of Abu Ayyash, who is Ibn Numan Maafiri. A group of narrators reported from him, no criticism of him has been recorded, and his hadith has firm foundations. Ibn Hibban overlooked mentioning him in his book of trustworthy narrators, even though he meets his criteria for inclusion.On this topic there is also a report from Ayesha, who said, "The Messenger of Allah ﷺ used to say often, 'O Turner of hearts, make my heart firm upon Your religion and Your obedience.'" So it was said to him, "Messenger of Allah, you say so often, 'O Turner of hearts, make my heart firm upon Your religion and Your obedience'?" He said, "What could make me feel secure, when the hearts of servants are between the two fingers of Rahman, and when He wishes to turn a servant's heart, He turns it."Imam Ahmad narrated it (26133), as did Abu Yaala (4669), Tabarani in Dua (1259), and Ibn Abu Asim in As-Sunnah (224, 233), all of them through routes from Hammad bin Salama, who said, Ali bin Zayd narrated to us, from Umm Muhammad, from Ayesha, and he related it.Its chain of transmission is daif because of Ali bin Zayd, who is Ibn Jadan, since the scholars have agreed in declaring him daif. As for Umm Muhammad, no one reported from her except Ali bin Zayd, and no one deemed her trustworthy except Ibn Hibban, so she is "unknown."The hadith has also been reported through another route, from Hasan, from Ayesha. Imam Ahmad narrated it (24604), but Hasan was a mudallis, and it has not been established that he heard directly from Ayesha.On this topic there is also a report from Abu Dharr in a long hadith, narrated by Ibn Khuzayma in Kitab Tawhid (134). It includes Shurahbil bin Hakam and his teacher Umar bin Nail, both of whom are daif. For this reason Ibn Khuzayma said, "I absolve myself of responsibility for Shurahbil bin Hakam and Amir bin Nail, for Allah has spared us, and to Him be abundant praise, from having to rely on the like of them in this matter."