Al-Ma'idah 5:73 — English Translation لقد كفر الذين قالوا ان الله ثالث ثلاثة وما من الاه الا الاه واحد وان لم ينتهوا عما يقولون ليمسن الذين كفروا منهم عذاب اليم ٧٣

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.