Quran 39:2 from Surah Az-Zumar on Divine Marvels.
إِنَّآ أَنزَلۡنَآ إِلَيۡكَ ٱلۡكِتَٰبَ بِٱلۡحَقِّ فَٱعۡبُدِ ٱللَّهَ مُخۡلِصٗا لَّهُ ٱلدِّينَ
English translation: Indeed We [We] have revealed to you the Book in truth so worship Allah (being) sincere to Him (in) the religion
Transliteration: inna anzalna ilayka al-kitaba bil-haqi fa-u'budi al-laha mukh'lisan lahu al-dina