'Whether' in the Bible

in order to try Israel by them, whether they are keeping the way of Jehovah, to go in it, as their fathers kept it or not.'

and they are to prove Israel by them, to know whether they obey the commands of Jehovah that He commanded their fathers by the hand of Moses.

And they say to him, 'Ask, we pray thee, at God, and we know whether our way is prosperous on which we are going.'