Dua 68 Recite this prayer for Allah's mercy and forgiveness:
(Surah Al-Mu'min (40), Verse 7)

رَبَّنَا وَسِعْتَ كُلَّ شَىْءٍ رَّحْمَةً وَعِلْمًا فَٱغْفِرْ لِلَّذِينَ تَابُوا۟ وَٱتَّبَعُوا۟ سَبِيلَكَ وَقِهِمْ عَذَابَ ٱلْجَحِيمِ

Rabbanaa wasi'ta kulla shai'ir rahmantanw wa 'ilman faghfir lillazeena taaboo wattaba'oo sabeelaka wa qihim 'azaabal Jaheem.

Our Lord! You embrace all things in mercy and knowledge. So forgive those who repent and follow Your way and save them from the punishment of hell.

(Surah Al-Mu'min (40), Verse 7)

Allah states in the Holy Quran that the bearers of the Throne and other noble angels constantly glorify Him day and night. They also recite the above prayer for righteous believers.
We are sinful servants, always in need of Allah's mercy and forgiveness. Therefore, we too should regularly recite this prayer.