out of the hand of Midian

Here "hand" represents the power of Midian over Israel. AT: "from the power of Midian" or "from Midian" (See: rc://en/ta/man/translate/figs-metonymy)

of Midian

Here "Midian" represents the people of Midian. AT: "of the Midianites" (See: rc://en/ta/man/translate/figs-metonymy)