'Behind' in the Bible

And Moses hath been feeding the flock of Jethro his father-in-law, priest of Midian, and he leadeth the flock behind the wilderness, and cometh in unto the mount of God, to Horeb;

and every first-born in the land of Egypt hath died, from the first-born of Pharaoh who is sitting on his throne, unto the first-born of the maid-servant who is behind the millstones, and all the first-born of beasts;