Christendom has its triad ​ — the Trinity. Clerics say that the Father, the Son, and the holy spirit are one God.
فَرِجَالُ ٱلدِّينِ يُعَلِّمُونَ أَنَّ ٱلْآبَ وَٱلِٱبْنَ وَٱلرُّوحَ ٱلْقُدُسَ هُمْ إِلٰهٌ وَاحِدٌ .‏