Surah Aali Imran (The Family of Imran), Verse 66

هٰۤاَنْتُمْ هٰۤؤُلَآءِ حَاجَجْتُمْ فِیْمَا لَكُمْ بِهٖ عِلْمٌ فَلِمَ تُحَآجُّوْنَ فِیْمَا لَیْسَ لَكُمْ بِهٖ عِلْمٌ وَاللّٰهُ یَعْلَمُ وَاَنْتُمْ لَا تَعْلَمُوْنَ ۟

Haaa antum haaa'ulaaa'i haajajtum feemaa lakum bihee 'ilmun falima tuhaaajjoonaa feemaa laisa lakum bihee 'ilm; wallaahu ya'lamu wa antum laa ta'lamoon

“Ah! Ye are those who fell to disputing (Even) in matters of which ye had some knowledge! but why dispute ye in matters of which ye have no knowledge? It is Allah Who knows, and ye who know not!”

Quran 3:66 (Yusuf Ali Translation)