Anas narrated, The Messenger of Allah (s.a.w) would often say: O Changer of the Hearts! Strengthen my heart upon Your deen. So I said: O Prophet of Allah! We believe in you and what you have come with, but do you fear for us? He said: Yes. Indeed the hearts are between two Fingers of Allah's Fingers, He changes them as He wills.
O Turner of the Hearts! Strengthen my heart upon Your Religion. Download this dua in Arabic and English translation. On a beautiful photo of mountains and cloud.