Surah An-Nazi'at 79:43
فِيمَ أَنتَ مِن ذِكْرَىٰهَآ
In what [position] are you that you should mention it?
Translation: Saheeh International
Tafsir
What have you to do with the mention of it? in other words you have no knowledge of it in order to mention it.
Excerpt from Tafsir al-Jalalayn, commentary on 79:43, via Quran.com. The reader has the full commentary and 9 more tafsirs.