Why does Moses hand became leprosy?

Moses' hand became leprous as a sign from God to demonstrate His power and to convince the Israelites of Moses' divine mission. In Exodus 4:6-7, God instructed Moses to place his hand inside his cloak, and when he removed it, it was leprous, symbolizing a miraculous sign. This transformation served as a way to affirm Moses' role as a leader and messenger of God, helping to build faith among the people. God then commanded Moses to restore his hand to normal, further illustrating His authority over disease and healing.