﴿ فَإِلَّمْ يَسْتَجِيبُوا۟ لَكُمْ فَٱعْلَمُوٓا۟ أَنَّمَآ أُنزِلَ بِعِلْمِ ٱللَّهِ وَأَن لَّآ إِلَٰهَ إِلَّا هُوَ ۖ فَهَلْ أَنتُم مُّسْلِمُونَ ﴾

“And if they [whom you have called to your aid] are not able to help you, then know that [this Qur'an] has been bestowed from on high out of God's wisdom alone, and that there is no deity save Him. Will you, then, surrender yourselves unto Him?"”

When they could not respond, Allah said: (And if they answer not your prayer) and if the wrong-doers do not answer you, (then know) O disbelievers (that it is revealed) that Gabriel brought down the Qur'an (only in the knowledge of Allah) and with his command; (and that there is no God save Him. Will ye then be (of) those who surrender?) and believe in Muhammad (pbuh) and in the Qur'an.