'Lo' in the Bible

And when Gideon was come, behold, there was a man telling a dream unto his fellow; and he said, Behold, I dreamed a dream; and, lo, a cake of barley bread tumbled into the camp of Midian, and came unto the tent, and smote it so that it fell, and turned it upside down, so that the tent lay flat.

for, lo, thou shalt conceive, and bear a son; and no razor shall come upon his head; for the child shall be a Nazirite unto God from the womb: and he shall begin to save Israel out of the hand of the Philistines.