'Diligently' in the Bible

For pass over to the isles of Kittim, and see; and send unto Kedar, and consider diligently; and see if there hath 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; then shall they 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, but to hallow the sabbath day, to do no work therein;