Qur'an 39:2 · Az-Zumar

إِنَّآ أَنزَلْنَآ إِلَيْكَ ٱلْكِتَٰبَ بِٱلْحَقِّ فَٱعْبُدِ ٱللَّهَ مُخْلِصًۭا لَّهُ ٱلدِّينَ

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