﴿ أَفَغَيْرَ ٱللَّهِ أَبْتَغِى حَكَمًۭا وَهُوَ ٱلَّذِىٓ أَنزَلَ إِلَيْكُمُ ٱلْكِتَٰبَ مُفَصَّلًۭا ۚ وَٱلَّذِينَ ءَاتَيْنَٰهُمُ ٱلْكِتَٰبَ يَعْلَمُونَ أَنَّهُۥ مُنَزَّلٌۭ مِّن رَّبِّكَ بِٱلْحَقِّ ۖ فَلَا تَكُونَنَّ مِنَ ٱلْمُمْتَرِينَ ﴾

“[say thou:] "Am I, then, to look unto anyone but God for judgment [as to what is right and wrong], when it is He who has bestowed upon you from on high this divine writ, clearly spelling out the truth?" And those unto whom We have vouchsafed revelation aforetime know that this one, too, has been bestowed from on high, step by step, by thy Sustainer. Be not, then, among the doubters-”

Then, say to them, O Muhammad: (Shall I seek other than Allah for judge) shall I worship as Lord other than Allah, (when He it is who has revealed unto you) you are your prophet ((this) Scripture) this Qur'an through the intermediary of Gabriel, (fully explained?) explaining fully the lawful and the unlawful; it is also said: it is revealed in instalments, a few verses on each occasion. (Those unto whom We gave the Scripture) those to whom We have given knowledge of the Torah, i.e. 'Abdullah Ibn Salam and his followers (know) are certain on the basis of their Scripture (that it) i.e. the Qur'an (is revealed from thy Lord in truth) with commands and prohibitions; it is also said that this means: Gabriel is sent by your Lord with the Truth, i.e. with the Qur'an. (So be not thou (O Muhammad) of the waverers) of those who doubt that they might not know this.