Pieper, Francis. Christian Dogmatics: Volume 2. St. Louis: Concordia Publishing House, 1968.
“The Abstract Terms in the First Genus” (Loc. 3648)
Pieper quotes the Formula of Concord, “Because in Christ divinity and humanity are one person, Scripture, on account of this personal union, ascribes also to the divinity everything that happens to the humanity, and vice versa” (Loc. 3648). The Reformers were very specific that in Christ God does suffer.