وَلَا يَزَالُ ٱلَّذِينَ كَفَرُواْ فِي مِرۡيَةٖ مِّنۡهُ حَتَّىٰ تَأۡتِيَهُمُ ٱلسَّاعَةُ بَغۡتَةً أَوۡ يَأۡتِيَهُمۡ عَذَابُ يَوۡمٍ عَقِيمٍ

Wa laa yazaalul lazeena kafaroo fee miryatim minhu hattaa taatiyahumus Saa'atu baghtatan aw yaatiyahum 'azaabu Yawmin 'aqeem

Those who reject Faith will not cease to be in doubt concerning (Revelation) until the Hour (of Judgment) comes suddenly upon them, or there comes to them the Penalty of a Day of Disaster.

— Al-Hajj (ٱلْحَجّ), 22:55