Dalil

Quran Taha 20:8

ٱللَّهُ لَآ إِلَٰهَ إِلَّا هُوَۖ لَهُ ٱلۡأَسۡمَآءُ ٱلۡحُسۡنَىٰ

Translation

Allāh - there is no deity except Him. To Him belong the best names.