Translation for 54:18

كَذَّبَتۡ عَادٞ فَكَيۡفَ كَانَ عَذَابِي وَنُذُرِ ١٨
’Ȃd ˹also˺ rejected ˹the truth˺. Then how ˹dreadful˺ were My punishment and warnings!