Surah Ash-Shu'ara, Ayah 201
Quran 26:201 · The Poets · Makki · Para 19 · Page 375
لَا یُؤْمِنُوْنَ بِهٖ حَتّٰی یَرَوُا الْعَذَابَ الْاَلِیْمَ ۟ۙ
Transliteration
La yu/minoona bihi hattayarawoo alAAathaba al-aleem
Saheeh International
They will not believe in it until they see the painful punishment.
Al-Mukhtasar fi Tafsir
They do not change from the state of disbelief they are in, and will not believe until they see the painful punishment.
Tafsir Ibn Kathir (abridged)
Explains 26:200–26:209 together — read it on 26:200