54:18

كَذَّبَتْ عَادٌ فَكَيْفَ كَانَ عَذَابِي وَنُذُرِ

Transliteration:

Kaththabat AAadun fakayfa kana AAathabee wanuthuri

Word by Word:

Denied Aad; so how was My punishment and My warnings?

Translations:

TO THE TRUTH gave the lie [the tribe of] Ad: and how severe was the suffering which I inflicted when My warnings were disregarded!

The 'Ad (people) (too) rejected (Truth): then how terrible was My Penalty and My Warning?

(The tribe of) A'ad rejected warnings. Then how (dreadful) was My punishment after My warnings.

Floating on, before Our eyes -- a reward for him who was denied.

'Aad denied; and how [severe] were My punishment and warning.