'Knowledge' in the Bible

Then she fell on her face, and bowed herself to the ground, and said unto him, Why have I found grace in thine eyes, that thou shouldest take knowledge of me, seeing I am a stranger?

And her mother in law said unto her, Where hast thou gleaned to day? and where wroughtest thou? blessed be he that did take knowledge of thee. And she shewed her mother in law with whom she had wrought, and said, The man's name with whom I wrought to day is Boaz.

And she took her rest at his feet till the morning: and she got up before it was light enough for one to see another. And he said, Let it not come to anyone's knowledge that the woman came to the grain-floor.