﴿ وَكَيْفَ تَكْفُرُونَ وَأَنتُمْ تُتْلَىٰ عَلَيْكُمْ ءَايَٰتُ ٱللَّهِ وَفِيكُمْ رَسُولُهُۥ ۗ وَمَن يَعْتَصِم بِٱللَّهِ فَقَدْ هُدِىَ إِلَىٰ صِرَٰطٍۢ مُّسْتَقِيمٍۢ ﴾

“And how could you deny the truth when it is unto you that God's messages are being conveyed, and it is in your midst that His Apostle lives? But he who holds fast unto God has already been guided onto a straight way.”

(How can ye disbelieve) in Allah. This is mentioned by way of amazement, (when it is ye unto whom Allah's revelations) the Qur'an containing commands and prohibitions (are recited, and His messenger) Muhammad (is in your midst?) with you. (He who holdeth fast to Allah) he who adheres to Allah's Religion and His Book, (he indeed is guided unto a right path) he is directed along a clear, solid way, which is Islam; it is also said this means: he has become firm on this way. This verse was revealed about Mu'adh [Ibn Jabal] and his companions.