'Lo' in the Bible

And she saith, 'Lo, thy sister-in-law hath turned back unto her people, and unto her god, turn thou back after thy sister-in-law.'

And lo, Boaz hath come from Beth-Lehem, and saith to the reapers, 'Jehovah is with you;' and they say to him, 'Jehovah doth bless thee.'

and now, is not Boaz of our acquaintance, with whose young women thou hast been? lo, he is winnowing the threshing-floor of barley to-night,

And it cometh to pass, at the middle of the night, that the man trembleth, and turneth himself, and lo, a woman is lying at his feet.

And Boaz hath gone up to the gate, and sitteth there, and lo, the redeemer is passing by of whom Boaz had spoken, and he saith, 'Turn aside, sit down here, such a one, such a one;' and he turneth aside and sitteth down.