Surah Al-Furqan — Ayah 4 (25:4)
وَقَالَ ٱلَّذِينَ كَفَرُوٓاْ إِنۡ هَٰذَآ إِلَّآ إِفۡكٌ ٱفۡتَرَىٰهُ وَأَعَانَهُۥ عَلَيۡهِ قَوۡمٌ ءَاخَرُونَۖ فَقَدۡ جَآءُو ظُلۡمٗا وَزُورٗا ٤
English translation (Saheeh International)
And those who disbelieve say, "This [Qur’ān] is not except a falsehood he invented, and another people assisted him in it." But they have committed an injustice and a lie.
Brief commentary
And those who disbelieved in Allah and His Messenger said: “This Qur’ān is nothing but a lie which Muhammad has fabricated and blasphemously attributed to Allah. Other people have also helped him in its fabrication”. These disbelievers themselves have made a false statement, because the Qur’ān is the speech of Allah; it is impossible for humans and jinn to come up anything like it.