From "Pierced for Our Transgressions"

“God the Father entered into an eternal covenant with God the Son; he made Christ the head, the representative of the elect, as Adam was the head, the representative of all his seed. For these the Lord Jesus Christ undertook to fulfill the covenant of works. For these Jesus Christ died a painful, cursed, ignominious death; and by his obedience, and by his death, wrought out an everlasting righteousness for them.”
- George Whitefield, quoted by Steve Jeffery, et al. in Pierced for Our Transgressions (Wheaton, Ill.; Crossway Books, 2007), 193