73لَقَد كَفَرَ الَّذينَ قالوا إِنَّ اللَّهَ ثالِثُ ثَلاثَةٍ ۘ وَما مِن إِلٰهٍ إِلّا إِلٰهٌ واحِدٌ ۚ وَإِن لَم يَنتَهوا عَمّا يَقولونَ لَيَمَسَّنَّ الَّذينَ كَفَروا مِنهُم عَذابٌ أَليمٌ(Saheeh International)They have certainly disbelieved who say, "Allāh is the third of three."1 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. i.e., one part of three, referring to the Christian concept of trinity.