In "Macbeth", what predictions do the witches make about Banquo?

In Act I, scene iii, Macbeth and Banquo go to visit the witches .  During this meeting, the prediction that the three witches make about Banquo is that his sons would be kings.  The first witch says, "Lesser than Macbeth, and greater." (Act I, scene iii)  The second says, "Not so happy, yet much happier." (Act I, scene iii). And the third witch finishes the prophecy when she states, "Thou shalt get kings, though thou be none: /So all hail, Macbeth and Banquo!" (Act I, scene iii.)