Quran 50:28 from Surah Qaaf on Divine Marvels.
قَالَ لَا تَخۡتَصِمُواْ لَدَيَّ وَقَدۡ قَدَّمۡتُ إِلَيۡكُم بِٱلۡوَعِيدِ
English translation: He will say (Do) not dispute (in) My presence and indeed I sent forth to you the Warning
Transliteration: qala la takhtasimu ladayya waqad qaddamtu ilaykum bil-wa'idi