Surah Al-Qamar, ayah 46

54:46

بَلِ ٱلسَّاعَةُ مَوۡعِدُهُمۡ وَٱلسَّاعَةُ أَدۡهَىٰ وَأَمَرُّ ٤٦

Balis-sā'atu maw'iduhum was-sā'atu adhā wa amarr

But the Hour is their appointment [for due punishment], and the Hour is more disastrous and more bitter.