52.الطُّوْر

فَلۡيَاۡتُوۡا بِحَدِيۡثٍ مِّثۡلِهٖۤ اِنۡ كَانُوۡا صٰدِقِيۡنَؕ‏

So let them produce a treatise like this (Qur’an) if they are truthful.