Surah Al-Mu'minun 23:69

أَمْ لَمْ يَعْرِفُوا۟ رَسُولَهُمْ فَهُمْ لَهُۥ مُنكِرُونَ

Or did they not know their Messenger, so they are toward him disacknowledging?

Translation: Saheeh International

Tafsir

Or is it that they do not recognise their own Messenger and so they reject him?

Excerpt from Tafsir al-Jalalayn, commentary on 23:69, via Quran.com. The reader has the full commentary and 9 more tafsirs.