Those who say, “Allah is one in a Trinity,” have certainly fallen into disbelief. There is only One God. If they do not stop saying this, those who disbelieve among them will be afflicted with a painful punishment.
— Dr. Mustafa Khattab, the Clear Quran
They have certainly disbelieved who say, "Allah 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.
— Saheeh International