'Knowledge of the Lord' in the Bible

I will take you as my bride in good faith, and you will have knowledge of the Lord.

Their works will not let them come back to their God, for a false spirit is in them and they have no knowledge of the Lord.

And let us have knowledge, let us go after the knowledge of the Lord; his going out is certain as the dawn, his decisions go out like the light; he will come to us like the rain, like the spring rain watering the earth.