Surah Al-Waqi'ah 56:62

وَلَقَدْ عَلِمْتُمُ ٱلنَّشْأَةَ ٱلْأُولَىٰ فَلَوْلَا تَذَكَّرُونَ

And you have already known the first creation, so will you not remember?

Translation: Saheeh International

Tafsir

For verily you have known the first creation al-nashā’ata a variant reading has al-nash’ata why then will you not remember? tadhakkarūna the original second tā’ of tatadhakkarūna has been assimilated with the dhāl.

Excerpt from Tafsir al-Jalalayn, commentary on 56:62, via Quran.com. The reader has the full commentary and 9 more tafsirs.