Surah Al-Mursalat 77:15

وَيْلٌ يَوْمَئِذٍ لِّلْمُكَذِّبِينَ

Woe, that Day, to the deniers.

Translation: Saheeh International

Tafsir

Woe to the deniers on that day! — a threat of chastisement for them.

Excerpt from Tafsir al-Jalalayn, commentary on 77:15, via Quran.com. The reader has the full commentary and 9 more tafsirs.