Augustine of Hippo
Catena Aurea · Lukasevangelium 16
And it came to pass, that the beggar died, and was carried by the angels into Abraham’s bosom: the rich man also died, and was buried; And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom. And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame. But Abraham said, Son, remember that thou in thy lifetime receivedst thy good things, and likewise Lazarus evil things: but now he is comforted, and thou art tormented. And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence.
(de Orig. Anim. 4. 16) Now as to your thinking Abraham’s bosom to be any thing bodily, I am afraid lest you should be thought to treat so weighty a matter rather lightly than seriously. For you could never be guilty of such folly, as to suppose the corporeal bosom of one man able to hold so many souls, nay, to use your own words, so many bodies as the Angels carry thither as they did Lazarus. But perhaps you imagine that one soul to have alone deserved to come to that bosom. If you would not fall into a childish mistake, you must understand Abraham’s bosom to be a retired and hidden resting-place where Abraham is; and therefore called Abraham’s, not that it is his alone, but because he is the father of many nations, and placed first, that others might imitate his preeminence of faith.