Surah Yunus 10:45

وَيَوْمَ يَحْشُرُهُمْ كَأَن لَّمْ يَلْبَثُوٓا۟ إِلَّا سَاعَةً مِّنَ ٱلنَّهَارِ يَتَعَارَفُونَ بَيْنَهُمْ ۚ قَدْ خَسِرَ ٱلَّذِينَ كَذَّبُوا۟ بِلِقَآءِ ٱللَّهِ وَمَا كَانُوا۟ مُهْتَدِينَ

And on the Day when He will gather them, [it will be] as if they had not remained [in the world] but an hour of the day, [and] they will know each other. Those will have lost who denied the meeting with Allāh and were not guided.

Translation: Saheeh International

Tafsir

And on the day when He shall gather them it is as if they had not tarried in this world or in the grave but an hour of the day because of the terror of what they see the comparative sentence is a circumstantial qualifier referring to the third person pronoun; …

Excerpt from Tafsir al-Jalalayn, commentary on 10:45, via Quran.com. The reader has the full commentary and 9 more tafsirs.