﴿ أَمْ يَقُولُونَ ٱفْتَرَىٰهُ ۚ بَلْ هُوَ ٱلْحَقُّ مِن رَّبِّكَ لِتُنذِرَ قَوْمًۭا مَّآ أَتَىٰهُم مِّن نَّذِيرٍۢ مِّن قَبْلِكَ لَعَلَّهُمْ يَهْتَدُونَ ﴾

“and yet, they [who are bent on denying the truth] assert, “[Muhammad] has invented it!” Nay, but it is the truth from thy Sustainer, enabling thee to warn [this] people to whom no warner has come before thee, so that they might follow the right path.”

Which was revealed in Al-Madinah The Virtues of Surah Alif Lam Mim As-Sajdah In the Book of the Friday prayer, Al-Bukhari recorded that Abu Hurayrah said, "The Prophet used to recite in Fajr on Fridays: الم تَنزِيلَ (Alif Lam Mim. The revelation of...), As-Sajdah, and هَلْ أَتَى عَلَى الإِنسَـنِ (Has there not been over man...)Al-Insan (76)." This was also recorded by Muslim. Imam Ahmad recorded that Jabir said, "The Prophet would never sleep until he recited: الم تَنزِيلَ (Alif Lam Mim. The revelation of...), As-Sajdah, and تَبَارَكَ الَّذِى بِيَدِهِ الْمُلْكُ (Blessed be He in Whose Hand is the dominion) Al-Mulk (67)." بِسْمِ اللَّهِ الرَّحْمَـنِ الرَّحِيمِ In the Name of Allah, the Most Gracious, the Most Merciful. The Qur'an is the Book of Allah in which there is no Doubt We discussed the individual letters at the beginning of Surat Al-Baqarah, and there is no need to repeat it here. تَنزِيلُ الْكِتَـبِ لاَ رَيْبَ فِيهِ (The revelation of the Book in which there is no doubt,) means, there is no doubt whatsoever that it has been revealed مِّن رَّبِّ الْعَـلَمِينَ (from the Lord of all that exists.) Then Allah tells us about the idolators: أَمْ يَقُولُونَ افْتَرَاهُ (Or say they: "He has fabricated it"): they say, he has fabricated it, i.e., he has made it up by himself. بَلْ هُوَ الْحَقُّ مِن رَّبِّكَ لِتُنذِرَ قَوْماً مَّآ أَتَـهُم مِّن نَّذِيرٍ مِّن قَبْلِكَ لَعَلَّهُمْ يَهْتَدُونَ (Nay, it is the truth from your Lord, so that you may warn a people to whom no warner has come before you, in order that they may be guided.) means, in order that they may follow the truth.