Surah Hud 11:103

إِنَّ فِى ذَٰلِكَ لَـَٔايَةً لِّمَنْ خَافَ عَذَابَ ٱلْـَٔاخِرَةِ ۚ ذَٰلِكَ يَوْمٌ مَّجْمُوعٌ لَّهُ ٱلنَّاسُ وَذَٰلِكَ يَوْمٌ مَّشْهُودٌ

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.

Translation: Saheeh International

Tafsir

There is indeed in that which is mentioned of stories a sign a lesson for him who fears the chastisement of the Hereafter that in other words the Day of Resurrection is a day to which on which mankind will be gathered and that is a day witnessed witnessed by all creatures.

Excerpt from Tafsir al-Jalalayn, commentary on 11:103, via Quran.com. The reader has the full commentary and 9 more tafsirs.