At-Tur - 52:34

فَلْيَأْتُوا بِحَدِيثٍ مِّثْلِهِ إِن كَانُوا صَادِقِينَ
[52:34]
Then let them bring an announcement like it if they are truthful.
Let them then produce a recital like unto it,- If (it be) they speak the truth!
Then let them produce speech the like thereof, if they are truthful.