Surah Ya-Sin 36:26

قِيلَ ٱدْخُلِ ٱلْجَنَّةَ ۖ قَالَ يَـٰلَيْتَ قَوْمِى يَعْلَمُونَ

It was said, "Enter Paradise." He said, "I wish my people could know

Translation: Saheeh International

Tafsir

It was said to him upon his death ‘Enter Paradise!’ — but it is also said that he entered it while he was still alive. He said ‘O yā is for calling attention to something would that my people knew

Excerpt from Tafsir al-Jalalayn, commentary on 36:26, via Quran.com. The reader has the full commentary and 9 more tafsirs.