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

“And on the Day when He shall gather them [unto Himself, it will seem to them] as if they had not tarried [on earth] longer than an hour of a day, knowing one another; [and] lost indeed will be they who [in their lifetime] considered it a lie that they were destined to meet God, and [thus] failed to find the right' way.”

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; recognising one another knowing one another upon their being resurrected but thereafter the recognition ceases on account of the severity of the terrors the last sentence is either an implied circumstantial qualifier or one connected to the adverbial qualifier yawma ‘on the day’; those will verily have lost who denied the encounter with God through resurrection for they were not guided.