Surah Al-Anbiya, ayah 55

قَالُوٓاْ أَجِئۡتَنَا بِٱلۡحَقِّ أَمۡ أَنتَ مِنَ ٱللَّٰعِبِينَ ٥٥

Qālū aji'tanā bil-haqqi am anta minal-lā'ibīn

They said, "Have you come to us with truth, or are you of those who jest?"