'Knows' in the Bible

David swore moreover, and said, "Your father knows well that I have found favor in your eyes; and he says, 'Don't let Jonathan know this, lest he be grieved:' but truly as Yahweh lives, and as your soul lives, there is but a step between me and death."

Have I today begun to inquire of God for him? Be it far from me! Don't let the king impute anything to his servant, nor to all the house of my father; for your servant knows nothing of all this, less or more."

He said to him, "Don't be afraid; for the hand of Saul my father shall not find you; and you shall be king over Israel, and I shall be next to you; and that also Saul my father knows."