Eusebius of Caesarea

In Psalm 104 [LXX], David, when referring to the stories of Abraham, Isaac and Jacob, the very men who were his godly ancestors, who lived before Moses' day, calls them Christs, only because they all received the outpouring of the Holy Spirit. And when he tells how they were hospitably received by foreigners, and how they learned that God was their Savior when plots were devised against them, following Moses' account, he names them prophets also and Christs, before Moses had been born and before he had laid down the rule that such men should be anointed with oil.