'Lo' in the Bible

And, behold, the acts of Asa, first and last, lo, they are written in the book of the kings of Judah and Israel.

Thou sayest, Lo, thou hast smitten Edom; and thy heart lifteth thee up to boast: abide now at home; why shouldest thou meddle to thy hurt, that thou shouldest fall, even thou, and Judah with thee?

For, lo, our fathers have fallen by the sword, and our sons and our daughters and our wives are in captivity for this.