Page 120
la-qad kafara lladhīna qālū ʾinna llāha thālithu thalāthatin wa-mā min ʾilāhin ʾillā ʾilāhun wāḥidun wa-ʾin lam yantahū ʿammā yaqūlūna la-yamassanna lladhīna kafarū minhum ʿadhābun ʾalīmun
They are certainly faithless who say, ‘Allah is the third [person] of a trinity,’ while there is no god except the One God. If they do not relinquish what they say, there shall befall the faithless among them a painful punishment.
— Ali Quli Qarai
Surah Al-Ma'idah, Verse 73
73. "Certainly they disbelieve who say: 'Verily Allah is the third of the three,' while there is no god save the One God; and if they desist not from what they say, a painful chastisement shall befall those among them who disbelieve."
This fact should be noted that what was referred to in the previous verse was the subject of extremism and unity with Allah. But, in this verse, the Qur'an points to the plurality of gods from the view point of the Christians, viz. three foldness in Divine Unity. It says:
In answer to them the Qur'an decisively says:
Then, the Qur'an, with a strong and severe tone, emphatically warns them: