'Diligently' in the Bible

For pass over to the isles of Chittim, and see; and send unto Kedar, and consider diligently, and see if there have been such a thing.

And it shall come to pass, if they will diligently learn the ways of my people, to swear by my name, As Jehovah liveth even as they taught my people to swear by Baal they shall be built up in the midst of my people.

And it shall come to pass, if ye diligently hearken unto me, saith Jehovah, to bring in no burden through the gates of this city on the sabbath day, and to hallow the sabbath day, to do no work therein;