Al-Muddaththir • EN-AL-JALALAYN
﴿ إِنْ هَٰذَآ إِلَّا قَوْلُ ٱلْبَشَرِ ﴾
“This is nothing but the word of mortal man!"”
this is nothing but the speech of humans’ similar to what they the idolaters had said ‘It is only a human that is teaching him’ Q. 16103.