Quran's authenticity

أَوَلَمْ يَكُن لَّهُمْ ءَايَةً أَن يَعْلَمَهُۥ عُلَمَـٰٓؤُا۟ بَنِىٓ إِسْرَٰٓءِيلَ

And has it not been a sign to them that it is recognized by the scholars of the Children of Israel?

تَنزِيلُ ٱلْكِتَـٰبِ لَا رَيْبَ فِيهِ مِن رَّبِّ ٱلْعَـٰلَمِينَ

[This is] the revelation of the Book about which there is no doubt from the Lord of the worlds.

وَلَا بِقَوْلِ كَاهِنٍ ۚ قَلِيلًا مَّا تَذَكَّرُونَ

Nor the word of a soothsayer; little do you remember.

إِذَا تُتْلَىٰ عَلَيْهِ ءَايَـٰتُنَا قَالَ أَسَـٰطِيرُ ٱلْأَوَّلِينَ

When Our verses are recited to him, he says, "Legends of the former peoples."