During their journey through the wilderness, the Israelites became discouraged by the difficulties they encountered. They complained against God and Moses, expressing dissatisfaction with their circumstances and the food God had provided.
Numbers 21 describes how venomous serpents appeared among the people, causing many deaths. Recognizing their wrongdoing, the Israelites approached Moses, confessed their sin, and asked him to intercede for them.
God instructed Moses to make an image of a serpent and place it upon a pole. Anyone who had been bitten could look upon the raised serpent and live.
Moses obeyed, making a bronze serpent and lifting it where the people could see it. Those who looked upon the serpent survived.
The incident became an important demonstration of divine judgment, mercy, and the possibility of deliverance through obedience to God.