although it is inconceivable that the Most Gracious should take unto Himself a son!

For it is not consonant with the majesty of (God) Most Gracious that He should beget a son.

When it is not meet for (the Majesty of) the Beneficent that He should choose a son.

And it is not worthy of the Beneficent that he should take to Himself a son.

And it is not appropriate for the Most Merciful that He should take a son.