Athanasius of Alexandria

For he it is who proceeded from a virgin and appeared as man on the earth and whose generation after the flesh cannot be declared. For there is none who can tell his father after the flesh, his body not being of a man but of a virgin alone. Thus, no one can declare the corporeal generation of the Savior from a man in the same way as one can draw up a genealogy of David and Moses and of all the patriarchs.