I will spread my net out over him, and he will be caught in my hunting net

Yahweh speaks of enabling the enemy army to capture the king as if he were trapping the king in a net. (See: rc://en/ta/man/jit/figs-metaphor)

he will be caught in my hunting net

This can be translated in active form. Alternate translation: "I will catch him in my hunting net" (See: rc://en/ta/man/jit/figs-activepassive)