Hud, 14 Ayah
11:14
فَإِلَّمۡ يَسۡتَجِيبُواْ لَكُمۡ فَٱعۡلَمُوٓاْ أَنَّمَآ أُنزِلَ بِعِلۡمِ ٱللَّهِ وَأَن لَّآ إِلَٰهَ إِلَّا هُوَۖ فَهَلۡ أَنتُم مُّسۡلِمُونَ ١٤
Fa'illam Yastajībū Lakum Fā`lamū 'Annamā 'Unzila Bi`ilmi Al-Lahi Wa 'An Lā 'Ilāha 'Illā Huwa ۖ Fahal 'Antum Muslimūna
And if they do not respond to you - then know that the Qur'an was revealed with the knowledge of Allah and that there is no deity except Him. Then, would you [not] be Muslims?