'Lo' in the Bible

For finding fault, He saith to them, 'Lo, days come, saith the Lord, and I will complete with the house of Israel, and with the house of Judah, a new covenant,

then I said, Lo, I come, (in a volume of the book it hath been written concerning me,) to do, O God, Thy will;'

then he said, 'Lo, I come to do, O God, Thy will;' he doth take away the first that the second he may establish;