Augustine of Hippo
Catena Aurea · Johannesevangelium 10
I am the good shepherd, and know my sheep, and am known of mine. As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep. And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd. Therefore doth my Father love me, because I lay down my life, that I might take it again. No man taketh it from me, but I lay it down of myself. I have power to lay it down, and I have power to take it again. This commandment have I received of my Father. There was a division therefore again among the Jews for these sayings. And many of them said, He hath a devil, and is mad; why hear ye him? Others said, These are not the words of him that hath a devil. Can a devil open the eyes of the blind?
(de Verb. Dom. s. 1) The sheep hitherto spoken of are those of the stock of Israel according to the flesh. But there were others of the stock of Israel, according to faith, Gentiles, who were as yet out of the fold; predestinated, but not yet gathered together. They are not of this fold, because they are not of the race of Israel, but they will be of this fold: Them also I must bring.