Musannaf Ibn Abi Shaybah 32426 — Book of Faith

Sayyidah Aishah (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) used to make this supplication: "O Turner of hearts, make my heart firm upon Your religion." I said: "O Messenger of Allah (peace and blessings be upon him)! You make this supplication?" He (peace and blessings be upon him) said: "O Aishah (may Allah be pleased with her)! Do you not know that the heart of the son of Adam is between the fingers of Allah? When He wills, He turns his heart toward guidance, and when He wills, He turns his heart toward misguidance and error."