Genesis 50:18

‘And his brothers also went and fell down before his face, and they said, “Behold we are your servants.” '

Once again they fall on their faces before him, fulfilling the dream at which they had once scoffed, as they have become used to doing through the years. And they admit, no, more than that, stress, that they are ‘his servants'. Now they do not get angry at his official superiority. They are eager to admit to it if only it will spare them from his revenge.