Answer:
When Macbeth delivers those lines, "give to the edge o´th´ sword his wife, his babes, and all unfortunate souls that trace him in his line," he is indicating that he will take the necessary steps to fulfill the visions and apparitions that he was shown by the three witches, in new prophecies, especially regarding the danger that the line of MacDuff, his worst enemy, presents to him and his own grasp on power.
Explanation:
"Macbeth" is the tragic play that was written by William Shakespeare and it is believed to have been first set on stage in 1606. This play narrates the stoy lives and events around Macbeth and his family. One thing that is important to know is that Macbeth´s life starts to develop from a series of prophecies that he and his friend Banquo receive, regarding immortality and the control of power in Scotland. Between Actt III and IV, Macbeth starts to wonder about the prophecies, because some things have happened that do not match what the witches had originally told him. So he calls them again and finds out from them that his power is being placed in jeopardy by the existence of the line of MacDuff. So, in Act IV, Macbeth decides to end the threat by taking away all that was part of that line, including MacDuff´s wife, children, and anyone connected to his line.
