How does Numbers 21 relate to Jesus' work on the cross?

In Numbers 21, the Israelites faced judgment due to their sin, represented by the venomous serpents. God provided a means of salvation through a bronze serpent lifted on a pole, which they were called to look upon in faith. This incident serves as a type of Christ's crucifixion; as the serpent was raised for healing, so Christ was raised on the cross for the spiritual healing of His people from the poison of sin. This typology is underscored in the New Testament, specifically John 3:14-15, where Jesus Himself draws a parallel between the lifting up of the serpent and His impending crucifixion, clarifying that faith in Him is essential for eternal life.