28:86
وَمَا كُنتَ تَرْجُوٓا۟ أَن يُلْقَىٰٓ إِلَيْكَ ٱلْكِتَـٰبُ إِلَّا رَحْمَةً مِّن رَّبِّكَ ۖ فَلَا تَكُونَنَّ ظَهِيرًا لِّلْكَـٰفِرِينَ
wamā kunta tarjū an yul'qā ilayka l-kitābu illā raḥmatan min rabbika falā takūnanna ẓahīran lil'kāfirīna
You yourself could not have expected the Scripture to be sent to you; it came only as a mercy from your Lord. So give no help to the disbelievers.
And you were not expecting that the Book (this Qur’ân) would be sent down to you, but it is a mercy from your Lord. So never be a supporter of the disbelievers.