The Enchiridion

And this earthly material, which when the soul leaves it becomes a corpse, shall not at the resurrection be so restored as that the parts into which it is separated, and which under various forms and appearances become parts of other things (though they shall all return to the same body from which they were separated), must necessarily return to the same parts of the body in which they were originally situated. For otherwise, to suppose that the hair recovers all that our frequent clippings and shavings have taken away from it, and the nails all that we have so often pared off, presents to the imagination such a picture of ugliness and deformity, as to make the resurrection of the body all but incredible.

But just as if a statue of some soluble metal were either melted by fire, or broken into dust, or reduced to a shapeless mass, and a sculptor wished to restore it from the same quantity of metal, it would make no difference to the completeness of the work what part of the statue any given particle of the material was put into, as long as the restored statue contained all the material of the original one; so God, the Artificer of marvellous and unspeakable power, shall with marvellous and unspeakable rapidity restore our body, using up the whole material of which it originally consisted.

Nor will it affect the completeness of its restoration whether hairs return to hairs, and nails to nails, or whether the part of these that had perished be changed into flesh, and called to take its place in another part of the body, the great Artist taking careful heed that nothing shall be unbecoming or out of place.