فَوَيْلٌ لِّلَّذِينَ كَفَرُوا مِن يَوْمِهِمُ الَّذِي يُوعَدُونَ (60)
(51:60) Woe, then, betide those who disbelieved in that Day of theirs which they are being asked to hold in dread.
It is derived from the very first word wadh-dhariyat, which implies that it is a Surah which begins with the word adh-dhariyat.