Numbers 21:9 in the King James Version of the Bible reads: "And Moses made a serpent of brass, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of brass, he lived."

This verse comes from the Book of Numbers, which is the fourth book of the Hebrew Bible and the Old Testament. The Book of Numbers takes its name from the censuses of the Israelites found in chapters 1 and 26, and it continues the story of the Israelites' journey from Mount Sinai to the plains of Moab on the border of Canaan. This particular passage occurs during their time in the wilderness.

The verse describes an event when the Israelites, weary in the wilderness, had become impatient and began to speak against God and Moses. As a punishment, God sent venomous snakes among the people, and they bit the Israelites, causing many of them to die. In response to their suffering, Moses prayed to God on behalf of the people, and God instructed Moses to make a bronze serpent and set it on a pole. Anyone who was bitten by a snake and then looked at the bronze serpent would live.

The symbolic meaning and commentary on this verse are both profound and multi-layered. On the surface, it illustrates God's mercy and provision for His people, even in the midst of their disobedience. However, this narrative also serves as a foreshadowing of Jesus Christ and His crucifixion.

The symbolism in this passage is significant. The bronze serpent lifted up on the pole is a type or prefiguring of Christ lifted up on the cross, as Jesus Himself references in the New Testament. In John 3:14-15, Jesus says, "And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, that whoever believes in Him should not perish but have eternal life." This connection between the bronze serpent and Jesus is a powerful representation of salvation and healing through faith.

The serpent itself is a symbol often associated with sin and the devil in the Bible, stemming from the serpent's role in the Garden of Eden. Yet in this passage, the bronze serpent represents the means of deliverance and healing from the deadly snakebites. It serves as a reminder that God has the power to turn curses into blessings and to provide a way of escape from the consequences of sin.

Furthermore, the act of looking to the bronze serpent for healing serves as a foreshadowing of the act of faith required to receive salvation through Jesus Christ. Just as the Israelites had to look upon the bronze serpent in faith to be healed, so too must individuals look to Jesus in faith for spiritual healing and eternal life.

The overarching theme of this passage is that of God's grace and salvation. Despite the Israelites' sinful grumblings and disobedience, God mercifully provided a way for them to be saved from the deadly consequences of their actions. In a similar manner, God offers salvation to all people through the death and resurrection of Jesus Christ, His Son. This narrative serves as a powerful reminder of God's enduring love and His desire to reconcile humanity to Himself.

In conclusion, Numbers 21:9 is a rich and profound passage with layers of meaning and symbolism. It not only provides historical context for the Israelites’ journey in the wilderness but also points forward to the ultimate act of salvation through Jesus Christ. The bronze serpent on the pole becomes a powerful symbol of God's provision, grace, and the means of spiritual healing and redemption for all who believe. It is a powerful testament to the unchanging nature of God and His redemptive plan for humanity.