Surah Hud, ayah 103

11:103

إِنَّ فِي ذَٰلِكَ لَأٓيَةٗ لِّمَنۡ خَافَ عَذَابَ ٱلۡأٓخِرَةِۚ ذَٰلِكَ يَوۡمٞ مَّجۡمُوعٞ لَّهُ ٱلنَّاسُ وَذَٰلِكَ يَوۡمٞ مَّشۡهُودٞ ١٠٣

Inna fī dhālika la'āyatal liman khāfa 'adhābal-ākhirati dhālika yawmum majmū'ul lahun-nāsu wadhālika yawmum mashhūd

Indeed in that is a sign for those who fear the punishment of the Hereafter. That is a Day for which the people will be collected, and that is a Day [which will be] witnessed.