Dua for death upon Imaan

Hakim Tirmidhi Rahimahullah states that I seen Allah Ta’ala (in my dream) and I said, “I fear losing my Imaan.” Allah Ta’ala said, Recite…   

يَا حَيُّ ياَ قَيُّوْمُ ياَ ذَا الجَلاَلِ وَالْاِكْرَاْمِ اَسْئَلُكَ اَنْ تُحْيِيَ قَلْبِيْ بِنُوْرِ مَعْرِفَتِكَ دَائِمًا اَبَدًا  يَا اللهُ يَا اللهُ يَا مُحْيِى اْلمَوْتٰى بِرَحْمَتِكَ يَا أَرْحَمَ الرَّاحِمِيْنَ (نزهة المجالس ومنتخب النفائس ص35 ج2)

Translation:- o the One that is Ever-Living, O the Controller of all things, O the one of Greatness and Generosity, I ask You to perpetually liven my heart by the Noor of Your recognition. O Allah! O Allah! O Allah! O The One that revives the dead, (I ask) through Your mercy, O the Most Merciful of the merciful ones.  

Allah Ta’ala sent an angel to him who made him sit up and passed his hands over his face and said, “Rejoice, Allah Ta’ala has certainly accepted your Taubah. He asked, “Who was my intercessor before Him?” He replied, “Your fear!” This Dua should be recited between the Sunnah and Fardh Salaah of Fajr.