Surah At-Tur, ayah 34

فَلۡيَأۡتُواْ بِحَدِيثٖ مِّثۡلِهِۦٓ إِن كَانُواْ صَٰدِقِينَ ٣٤

Falya'tū bihadīthim mithlihī in kānū sādiqīn

Then let them produce a statement like it, if they should be truthful.