Qur'an 2:163 Al-Baqarah

وَإِلَٰهُكُمْ إِلَٰهٌۭ وَٰحِدٌۭ ۖ لَّآ إِلَٰهَ إِلَّا هُوَ ٱلرَّحْمَٰنُ ٱلرَّحِيمُ

And your god is one God. There is no deity [worthy of worship] except Him, the Entirely Merciful, the Especially Merciful.

Saheeh International