'Lo' in the Bible

and the servants of the king say unto him, 'Lo, Haman is standing in the court;' and the king saith, 'Let him come in.'

And Harbonah, one of the eunuchs, saith before the king, 'Also lo, the tree that Haman made for Mordecai, who spake good for the king, is standing in the house of Haman, in height fifty cubits;' and the king saith, 'Hang him upon it.'

And the king Ahasuerus saith to Esther the queen, and to Mordecai the Jew, 'Lo, the house of Haman I have given to Esther, and him they have hanged on the tree, because that he put forth his hand on the Jews,