NET

17 And he will go as forerunner before the Lord in the spirit and power of Elijah, to turn the hearts of the fathers back to their children and the disobedient to the wisdom of the just, to make ready for the Lord a people prepared for him.”

Darby

17 And *he* shall go before him in [the] spirit and power of Elias, to turn hearts of fathers to children, and disobedient ones to [the] thoughts of just [men], to make ready for [the] Lord a prepared people.

KJV

17 And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.