Our noble brother Abū ʿUways (rahīmaḥullāh) details the many slanderous lies Christians to portray against ‘Isá (ʿalayhi al-salām) and His Lord, Allāh subḥānahū wa taʿāla. This is an especially important talk for those of us living in Western countries, dominated by the Christian belief. It should not be the case that we are not fazed by such absurdities, rather upon us is to be callers to Allāh’s dīn, and to refute these heinous claims against Him,ʿaza wa jal, and His messengers.
And they say: “The Most Beneficent (Allāh) has begotten a son (or offspring or children) [as the Jews say: ʿUzayr (Ezra) is the son of Allāh, and the Christians say that He has begotten a son [ʿIsá (Christ) ], and the pagan Arabs say that He has begotten daughters (angels, etc.)].” Indeed you have brought forth (said) a terrible evil thing. Whereby the heavens are almost torn, and the earth is split asunder, and the mountains fall in ruins, That they ascribe a son (or offspring or children) to the Most Beneficent (Allāh). But it is not suitable for (the Majesty of) the Most Beneficent (Allāh) that He should beget a son (or offspring or children). There is none in the heavens and the earth but comes unto the Most Beneficent (Allāh) as a slave.]
[Sūrah Maryam, 19:89-93]