Surah An-Nisa, ayah 171

يَٰٓأَهۡلَ ٱلۡكِتَٰبِ لَا تَغۡلُواْ فِي دِينِكُمۡ وَلَا تَقُولُواْ عَلَى ٱللَّهِ إِلَّا ٱلۡحَقَّۚ إِنَّمَا ٱلۡمَسِيحُ عِيسَى ٱبۡنُ مَرۡيَمَ رَسُولُ ٱللَّهِ وَكَلِمَتُهُۥٓ أَلۡقَىٰهَآ إِلَىٰ مَرۡيَمَ وَرُوحٞ مِّنۡهُۖ فَـَٔامِنُواْ بِٱللَّهِ وَرُسُلِهِۦۖ وَلَا تَقُولُواْ ثَلَٰثَةٌۚ ٱنتَهُواْ خَيۡرٗا لَّكُمۡۚ إِنَّمَا ٱللَّهُ إِلَٰهٞ وَٰحِدٞۖ سُبۡحَٰنَهُۥٓ أَن يَكُونَ لَهُۥ وَلَدٞۘ لَّهُۥ مَا فِي ٱلسَّمَٰوَٰتِ وَمَا فِي ٱلۡأَرۡضِۗ وَكَفَىٰ بِٱللَّهِ وَكِيلٗا ١٧١

Yā'ahlal-kitābi lā taghlū fī dīnikum walā taqūlū 'alallāhi illal-haqqa innamal-masīhu 'īsabnu maryama rasūlullāhi wakalimatuhū alqāhā ilā maryama warūhum minhu fa'āminū billāhi warusulihī walā taqūlū thalāthatunintahū khayral lakum innamallāhu ilāhun wāhidun subhānahū an yakūna lahū waladul lahū mā fis-samāwāti wamā fil-ardi wakafā billāhi wakīlā

O People of the Scripture, do not commit excess in your religion²³⁶ or say about Allāh except the truth. The Messiah, Jesus the son of Mary, was but a messenger of Allāh and His word which He directed to Mary and a soul [created at a command] from Him. So believe in Allāh and His messengers. And do not say, "Three"; desist - it is better for you. Indeed, Allāh is but one God. Exalted is He above having a son. To Him belongs whatever is in the heavens and whatever is on the earth. And sufficient is Allāh as Disposer of affairs.