that by them I may prove Israel, whether they will keep the way of Jehovah to walk therein, as their fathers did keep it, or not.

In order to put Israel to the test, and see if they will keep the way of the Lord, walking in it as their fathers did, or not.

δια να δοκιμασω τον Ισραηλ δια μεσου αυτων, εαν φυλαττωσι την οδον του Κυριου, περιπατουντες εν αυτη, καθως εφυλαξαν αυτην οι πατερες αυτων, η ουχι.

That through them I may prove Israel, whether they will keep the way of the Lord to walk therein, as their fathers did keep it, or not.