'Face of the Lord' in the Bible

And they heard the voice of the LORD God as he walked in the garden in the cool of the day. And Adam hid himself and his wife also from the face of the LORD God, among the trees of the garden.

And Cain went away from before the face of the Lord, and made his living-place in the land of Nod on the east of Eden.

For we will destroy this place, because the cry of them is waxen great before the face of the LORD; and the LORD hath sent us to destroy it.