لَقَدْ كَفَرَ الَّذٖینَ قَالُٓوا اِنَّ اللّٰهَ ثَالِثُ ثَلٰثَةٍۘ وَمَا مِنْ اِلٰهٍ اِلَّٓا اِلٰهٌ وَاحِدٌؕ وَاِنْ لَمْ یَنْتَهُوا عَمَّا یَقُولُونَ لَیَمَسَّنَّ الَّذٖینَ كَفَرُوا مِنْهُمْ عَذَابٌ اَلٖیمٌ
Laqad kafara allatheena qaloo inna Allaha thalithu thalathatin wama min ilahin illa ilahun wahidun wain lam yantahoo AAamma yaqooloona layamassanna allatheena kafaroo minhum AAathabun aleemun
Translations
They have certainly disbelieved who say, "Allah is the third of three." And there is no god except one God. And if they do not desist from what they are saying, there will surely afflict the disbelievers among them a painful punishment
Saheeh International
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
Marmaduke Pickthall