Steadfastness in faith (istiqamah)

رَبَّنَا لَا تُزِغْ قُلُوبَنَا بَعْدَ إِذْ هَدَيْتَنَا وَهَبْ لَنَا مِن لَّدُنكَ رَحْمَةً ۚ إِنَّكَ أَنتَ ٱلْوَهَّابُ

[Who say], "Our Lord, let not our hearts deviate after You have guided us and grant us from Yourself mercy. Indeed, You are the Bestower.

قَالَ قَدْ أُجِيبَت دَّعْوَتُكُمَا فَٱسْتَقِيمَا وَلَا تَتَّبِعَآنِّ سَبِيلَ ٱلَّذِينَ لَا يَعْلَمُونَ

[Allāh] said, "Your supplication has been answered." So remain on a right course and follow not the way of those who do not know."

فَلِذَٰلِكَ فَٱدْعُ ۖ وَٱسْتَقِمْ كَمَآ أُمِرْتَ ۖ وَلَا تَتَّبِعْ أَهْوَآءَهُمْ ۖ وَقُلْ ءَامَنتُ بِمَآ أَنزَلَ ٱللَّهُ مِن كِتَـٰبٍ ۖ وَأُمِرْتُ لِأَعْدِلَ بَيْنَكُمُ ۖ ٱللَّهُ رَبُّنَا وَرَبُّكُمْ ۖ لَنَآ أَعْمَـٰلُنَا وَلَكُمْ أَعْمَـٰلُكُمْ ۖ لَا حُجَّةَ بَيْنَنَا وَبَيْنَكُمُ ۖ ٱللَّهُ يَجْمَعُ بَيْنَنَا ۖ وَإِلَيْهِ ٱلْمَصِيرُ

So to that [religion of Allāh] invite, [O Muḥammad], and remain on a right course as you are commanded and do not follow their inclinations but say, "I have believed in what Allāh has revealed of scripture [i.e., the Qur’ān], and I have been commanded to do justice among you. Allāh is our Lord and your Lord. For us are our deeds, and for you your deeds. There is no [need for] argument between us and you. Allāh will bring us together, and to Him is the [final] destination."