Surah Az-Zumar, Verse 2

إِنَّآ أَنزَلۡنَآ إِلَيۡكَ ٱلۡكِتَٰبَ بِٱلۡحَقِّ فَٱعۡبُدِ ٱللَّهَ مُخۡلِصٗا لَّهُ ٱلدِّينَ٢

innā anzalnā ilayka l-kitāba bil-ḥaqi fa-uʿ'budi l-laha mukh'liṣan lahu l-dīna

Indeed, We have sent down to you the Book, [O Muḥammad], in truth. So worship Allāh, [being] sincere to Him in religion.