'Lo' in the Bible

And Moses spoke before Jehovah, saying, Lo, the children of Israel do not hearken to me: how then should Pharaoh hearken to me, to me of uncircumcised lips?

And Moses said, It is not proper to do so; for we should sacrifice the abomination of the Egyptians to Jehovah our God: lo, if we sacrificed the abomination of the Egyptians before their eyes, would they not stone us?

And Jehovah said to Moses, Lo, I will come to thee in the cloud's thick darkness, that the people may hear when I speak with thee, and believe thee also for ever. And Moses told the words of the people to Jehovah.