Translation:

15. And We have left this as a Sign (for all time): then is there any that will receive admonition?

Notes (Tafseer)

5140. Cf. xxix. 15, where the Ark (with the salvation it brought to the righteous) is mentioned as a Sign for all Peoples. So also in xxv, 37 and xxvi. 121, it is a Sign for men. Similarly the saving of Lot, with the destruction of the wicked Cities of the Plain, is mentioned as a Sign left for those who would understand: xxix. 35, and li. 37.

5141. A refrain that occurs six times in this Sura: see Introduction.