'Knowest' in the Bible

And the sons of the prophets that were at Bethel came forth to Elisha, and said unto him, Knowest thou that the LORD will take away thy master from thy head to day? And he said, Yea, I know it; hold ye your peace.

And the sons of the prophets that were at Jericho came to Elisha, and said unto him, Knowest thou that the LORD will take away thy master from thy head to day? And he answered, Yea, I know it; hold ye your peace.

Now there cried a certain woman of the wives of the sons of the prophets unto Elisha, saying, Thy servant my husband is dead; and thou knowest that thy servant did fear the LORD: and the creditor is come to take unto him my two sons to be bondmen.