Verse 23

قَالَ إِنَّمَا ٱلْعِلْمُ عِندَ ٱللَّهِ وَأُبَلِّغُكُم مَّآ أُرْسِلْتُ بِهِۦ وَلَـٰكِنِّىٓ أَرَىٰكُمْ قَوْمًا تَجْهَلُونَ

He said; indeed the knowledge thereof is only with God. I am just delivering what I was sent with, however, I see that you are ignorant people.