﴿ وَأَنَّا ظَنَنَّآ أَن لَّن تَقُولَ ٱلْإِنسُ وَٱلْجِنُّ عَلَى ٱللَّهِ كَذِبًۭا ﴾

“and that [we were mistaken when] we thought that neither man nor [any of] the invisible forces would ever tell a lie about God.”

And lo! we had supposed that humankind and jinn would not speak a lie concerning Allah) and we thought that what humans and the jinn said about Allah was not a lie, but we know now that it is. From the beginning of the surah up to here, Allah related what the jinn said.