'Lo' in the Bible

And when he came, lo, Eli was sitting upon his seat by the wayside watching; for his heart trembled for the ark of God. And when the man came into the city, and told it, all the city cried out.

When thou art departed from me to-day, then thou shalt find two men by Rachel's sepulchre, in the border of Benjamin at Zelzah; and they will say unto thee, The asses which thou wentest to seek are found; and, lo, thy father hath left off caring for the asses, and is anxious for you, saying, What shall I do for my son?

Then Saul said to Jonathan, Tell me what thou hast done. And Jonathan told him, and said, I did certainly taste a little honey with the end of the rod that was in my hand; and, lo, I must die.

Then said Achish unto his servants, Lo, ye see the man is mad; wherefore then have ye brought him to me?