Surah Al-Kahf, verse 3

ٱلْحَمْدُ لِلَّهِ ٱلَّذِىٓ أَنزَلَ عَلَىٰ عَبْدِهِ ٱلْكِتَـٰبَ وَلَمْ يَجْعَل لَّهُۥ عِوَجَا ۜ ﴿١﴾

[All] praise is [due] to Allāh, who has sent down upon His Servant [Muḥammad (ﷺ)] the Book and has not made therein any deviance.

قَيِّمًۭا لِّيُنذِرَ بَأْسًۭا شَدِيدًۭا مِّن لَّدُنْهُ وَيُبَشِّرَ ٱلْمُؤْمِنِينَ ٱلَّذِينَ يَعْمَلُونَ ٱلصَّـٰلِحَـٰتِ أَنَّ لَهُمْ أَجْرًا حَسَنًۭا ﴿٢﴾

[He has made it] straight, to warn of severe punishment from Him and to give good tidings to the believers who do righteous deeds that they will have a good reward [i.e., Paradise].

وَيُنذِرَ ٱلَّذِينَ قَالُوا۟ ٱتَّخَذَ ٱللَّهُ وَلَدًۭا ﴿٤﴾

And to warn those who say, "Allāh has taken a son".

مَّا لَهُم بِهِۦ مِنْ عِلْمٍۢ وَلَا لِـَٔابَآئِهِمْ ۚ كَبُرَتْ كَلِمَةًۭ تَخْرُجُ مِنْ أَفْوَٰهِهِمْ ۚ إِن يَقُولُونَ إِلَّا كَذِبًۭا ﴿٥﴾

They have no knowledge of it, nor had their fathers. Grave is the word that comes out of their mouths; they speak not except a lie.