﴿ فَأَنجَيْنَٰهُ وَٱلَّذِينَ مَعَهُۥ بِرَحْمَةٍۢ مِّنَّا وَقَطَعْنَا دَابِرَ ٱلَّذِينَ كَذَّبُوا۟ بِـَٔايَٰتِنَا ۖ وَمَا كَانُوا۟ مُؤْمِنِينَ ﴾

“And so, by Our grace, We saved him and those who stood by him, the while We wiped out the last remnant of those who gave the lie to Our messages and would not believe.”

(And We saved him) i.e. Hud (and those with him by a mercy from Us) for them, (and We cut the root of those who denied Our revelations) We exterminated those who denied Our Scripture and Messenger Hud (and were not believers) those who were destroyed were all disbelievers.