What does the Bible say about the serpent lifted up by Moses?

In Numbers 21, God instructed Moses to make a brazen serpent and lift it up on a pole, promising that anyone who looked at it would be healed from the poisonous bites of serpents. This historical event serves as a powerful type of Christ, who was lifted up on the cross for the salvation of His people. Just as the Israelites had to look to the serpent for healing, believers must look to Christ in faith for eternal life. In John 3:14-15, Jesus directly connects this event to His own crucifixion, stating, 'As Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up.'