From the Shorter Catechism

Q. 27. Wherein did Christ’s humiliation consist?

A. Christ’s humiliation consisted in his being born, and that in a low condi- tion, made under the law, undergoing the miseries of this life, the wrath of God, and the cursed death of the cross; in being buried, and continuing under the power of death for a time. Luke 2:7; Gal. 4:4; Heb. 12:2-3; Isa. 53:2-3; Luke 22:44; Matt. 27:46; Phil. 2: 8; 1 Cor. 15:3-4; Acts 2:24-27, 31.