5:73
لَّقَدۡ كَفَرَ ٱلَّذِینَ قَالُوۤا۟ إِنَّ ٱللَّهَ ثَالِثُ ثَلَـٰثَةࣲۘ وَمَا مِنۡ إِلَـٰهٍ إِلَّاۤ إِلَـٰهࣱ وَ ٰحِدࣱۚ وَإِن لَّمۡ یَنتَهُوا۟ عَمَّا یَقُولُونَ لَیَمَسَّنَّ ٱلَّذِینَ كَفَرُوا۟ مِنۡهُمۡ عَذَابٌ أَلِیمٌ
They surely disbelieve who say: Lo! Allah is the third of three; when there is no Allah save the One Allah. If they desist not from so saying a painful doom will fall on those of them who disbelieve.
— Mohammed Marmaduke William Pickthall
laqad kafaral lazeena qaalooo innal laaha saalisu salaasah; wa maa min ilaahin illaaa Ilaahunw Waahid; wa illam yantahoo 'ammaa yaqooloona layamas sannal lazeena kafaroo minhum 'azaabun aleem