At Tur, 34 Ayah
52:34
فَلۡيَأۡتُواْ بِحَدِيثٖ مِّثۡلِهِۦٓ إِن كَانُواْ صَٰدِقِينَ ٣٤
Falya'tū Biĥadīthin Mithlihi 'In Kānū Şādiqīna
Then let them produce a statement like it, if they should be truthful.