Ambrose of Milan, on Hos 3:2

“And I bought her to me for fifteen pieces of silver, and for a core of barley, and for half a core of barley.”

“These then are that seven and eight whereof Hosea says that by that number he purchased to himself, and acquired the fulness of faith, for thus it is written, So I bought her to me for fifteen pieces of silver, and for an homer of barley, and an half homer of barley, and a measure of wine. But in the former verses God had commanded him to hire to himself an harlot, and it is manifest that he did so, in that he has mentioned the price of her hiring. Now the fifteen pieces of silver are made up of the numbers seven and eight, wherefore they represent these numbers.”

Imported from an open dataset — not yet checked against the printed edition.