'Diligently' in the Bible

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

And it shall come to pass, if they will diligently learn the ways of my people, to swear by my name, The LORD liveth; as they taught my people to swear by Baal; then shall they be built in the midst of my people.

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