# This will be the practice ... He will take

The practice of the king will be to take. This begins the list of things he will take.

# This will be the practice of the king who will reign over you

The abstract noun "practice" can be translated as a verb. Alternate translation: "This is how the king who will reign over you will act" or "This is what the king who will reign over you will do" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])

# appoint them to his chariots

"have them drive chariots in battle"

# be his horsemen

They will ride horses into battle.