Then they set out from Mount Hor by way of the Red Sea to bypass the land of Edom, but the people became impatient because of the journey. The people spoke against God and Moses: “Why have you led us up from Egypt to die in the wilderness? There is no bread or water, and we detest this wretched food!” Then the LORD sent poisonous snakes among the people, and they bit them so that many Israelites died. The people then came to Moses and said, “We have sinned by speaking against the LORD and against you. Intercede with the LORD so that he will take the snakes away from us.” And Moses interceded for the people. Then the LORD said to Moses, “Make a snake image and mount it on a pole. When anyone who is bitten looks at it, he will recover.” So Moses made a bronze snake and mounted it on a pole. Whenever someone was bitten, and he looked at the bronze snake, he recovered.
(Numbers 21:4-9)

For the word of the cross is foolishness to those who are perishing, but it is the power of God to us who are being saved.
(1 Corinthians 1:18)

He made the one who did not know sin to be sin for us, so that in him we might become the righteousness of God.
(2 Corinthians 5:21)

Jesus was spiritually cursed that He might become your spiritual cure.

“Just as Moses lifted up the snake in the wilderness, so the Son of Man must be lifted up, so that everyone who believes in him may have eternal life. For God loved the world in this way: He gave his one and only Son, so that everyone who believes in him will not perish but have eternal life.”
(John 3:14-16)