Surah Al-Baqarah 2:104

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَقُولُوا۟ رَٰعِنَا وَقُولُوا۟ ٱنظُرْنَا وَٱسْمَعُوا۟ ۗ وَلِلْكَـٰفِرِينَ عَذَابٌ أَلِيمٌ

O you who have believed, say not [to Allāh's Messenger], "Rāʿinā" but say, "Unẓurnā" and listen. And for the disbelievers is a painful punishment.

Translation: Saheeh International

Tafsir

O you who believe do not say to the Prophet s ‘Observe us’ rā‘inā is an imperative form from murā‘āt which they used to say to him and this was a derogatory term in Hebrew derived from the noun al-ru‘ūna ‘thoughtlessness’. …

Excerpt from Tafsir al-Jalalayn, commentary on 2:104, via Quran.com. The reader has the full commentary and 9 more tafsirs.