Verses 5:73–74

لَّقَدْ كَفَرَ ٱلَّذِينَ قَالُوٓا۟ إِنَّ ٱللَّهَ ثَالِثُ ثَلَـٰثَةٍ ۘ وَمَا مِنْ إِلَـٰهٍ إِلَّآ إِلَـٰهٌ وَٰحِدٌ ۚ وَإِن لَّمْ يَنتَهُوا۟ عَمَّا يَقُولُونَ لَيَمَسَّنَّ ٱلَّذِينَ كَفَرُوا۟ مِنْهُمْ عَذَابٌ أَلِيمٌ

أَفَلَا يَتُوبُونَ إِلَى ٱللَّهِ وَيَسْتَغْفِرُونَهُۥ ۚ وَٱللَّهُ غَفُورٌ رَّحِيمٌ

“Those who say that God is the third of three have certainly disbelieved. And there is no god except one God. And if they do not desist from what they are saying, those who have disbelieved among them will surely be touched by a painful punishment. So will they not repent to God and seek His forgiveness? And God is Forgiving and Merciful.”