As part of the daily after Fajr program regarding the life of a Muslim, the following is a Sunnah Dua for the stability of Imaan and continuance of Divine Bounties (Nasaa-i, Ibne-Hibbaan)

اللَّهُمَّ إِنِّي أَسْأَلُكَ إِيمَانًا لَا يَرْتَدُ وَ نَعِيمًا لَا يَنْفَدُ وَ مُرَافَقَةَ مُحَمَّدٍ فِي أَعْلَى جَنَّةِ الْخُلْدِ

Transliteration: Allāhumma innī as’aluka emānan la yartadu wa na’īman la yanfadu wa murāfaqatah Muhammadin fī a’lā Jannat al-Khuld

Translation: O Allah, I ask you for firm faith that does not revert, and bliss that never ends, and then companionship of Muhammad at the highest (level) of eternal Paradise.