'Adjuring' in the Bible

And Jonathan hath not heard of his father's adjuring the people, and putteth forth the end of the rod, which is in his hand, and dippeth it in the honeycomb, and bringeth back his hand unto his mouth -- and his eyes see!

And the king saith unto him, 'How many times am I adjuring thee that thou speak nothing unto me but truth in the name of Jehovah?'

And the king saith unto him, 'How many times am I adjuring thee, that thou speak unto me only truth in the name of Jehovah?'