In Part 12 of the commentary (tafseer) of Chapter 50 of the Quran, Surah  Qaaf, we review Verses 36 to 37 under the theme of A Warning and  Reminder."
وَكَمْ أَهْلَكْنَا قَبْلَهُمْ مِنْ قَرْنٍ هُمْ أَشَدُّ مِنْهُمْ بَطْشًا فَنَقَّبُوا فِي الْبِلَادِ هَلْ مِنْ مَحِيصٍ {36}
[50:36] And how many a generation did We destroy before them who were mightier  in prowess than they, so they went about and about in the lands. Is  there a place of refuge?
إِنَّ فِي ذَٰلِكَ لَذِكْرَىٰ لِمَنْ كَانَ لَهُ قَلْبٌ أَوْ أَلْقَى السَّمْعَ وَهُوَ شَهِيدٌ {37}
[50:37] Most surely there is a reminder in this for him who has a heart or he gives ear and is a witness.
?????? ??????? ??????????: Shaykh Hasan al-Nakhli  from Dar al-Sayyida Ruqayya (peace be upon her) found @ http://www.ruqayah.net/audio/index.php?catb=166&part=1