﴿ فَقُطِعَ دَابِرُ ٱلْقَوْمِ ٱلَّذِينَ ظَلَمُوا۟ ۚ وَٱلْحَمْدُ لِلَّهِ رَبِّ ٱلْعَٰلَمِينَ ﴾

“and [in the end,] the last remnant of those folk who had been bent on evildoing was wiped out. For all praise is due to God, the Sustainer of all the worlds.”

In the last verse (45), it was said that, when the mass punishment of Allah Ta` ala came, the people who did wrong were uprooted to the last man. Said immediately after was: وَالْحَمْدُ لِلَّـهِ رَ‌بِّ الْعَالَمِينَ (And praise be to Allah, the Lord of the worlds) where the hint given is: Whenever the wrongdoers and the unjust are visited by some punishment or calamity, that is a blessing for the whole world for which people should be grateful.