54.الْقَمَر

وَلَقَد تَّرَكۡنٰهَاۤ اٰيَةً فَهَلۡ مِنۡ مُّدَّكِرٍ‏

And surely We made (the ruins of the Deluge) subsist as a Sign. So is there anyone who will think (and take advice)?