Surah Qaf 50:28

قَالَ لَا تَخْتَصِمُوا۟ لَدَىَّ وَقَدْ قَدَّمْتُ إِلَيْكُم بِٱلْوَعِيدِ

[Allāh] will say, "Do not dispute before Me, while I had already presented to you the threat [i.e., warning].

Translation: Saheeh International

Tafsir

He exalted be He will say ‘Do not dispute in My presence in other words disputing is of no use here for I had already given you in the life of the world the threat of chastisement in the Hereafter should you not believe and so it is now inevitable.

Excerpt from Tafsir al-Jalalayn, commentary on 50:28, via Quran.com. The reader has the full commentary and 9 more tafsirs.