Cyril of Alexandria : Whoever suffers anything on account of me obtains help from me, the One who gives strength to you, Jacob, that is, all of you from the seed of Jacob. I have said how he sends them prophetic words in the mouth of the holy apostles and evangelists that they are from Jacob, which clearly relates to the flesh. And it is small wonder that Jacob was called the supplanter, that is, the supplanter of Satan and of those who casually and with youthful neglect rush into the noose of sins. — COMMENTARY ON Isaiah 4:4.49:25-26