Surah Hud, ayah 14

فَإِلَّمۡ يَسۡتَجِيبُواْ لَكُمۡ فَٱعۡلَمُوٓاْ أَنَّمَآ أُنزِلَ بِعِلۡمِ ٱللَّهِ وَأَن لَّآ إِلَٰهَ إِلَّا هُوَۖ فَهَلۡ أَنتُم مُّسۡلِمُونَ ١٤

Fa illam yastajībū lakum fa'lamū annamā unzila bi'ilmillāhi wa al lā ilāha illā huwa fahal antum muslimūn

And if they do not respond to you - then know that it [i.e., the Qur’ān] was revealed with the knowledge of Allāh⁵⁵¹ and that there is no deity except Him. Then,⁵⁵² would you [not] be Muslims?