Surah Al-Mursalat 77:19

وَيْلٌ يَوْمَئِذٍ لِّلْمُكَذِّبِينَ

Woe, that Day, to the deniers.

Translation: Saheeh International

Tafsir

Woe to the deniers on that day! — reiterated for emphasis.

Excerpt from Tafsir al-Jalalayn, commentary on 77:19, via Quran.com. The reader has the full commentary and 9 more tafsirs.