Because He made a covenant with them so that, verse 63, "You may remember and be ashamed and never open your mouth anymore because of your humiliation...listen to this...when I have forgiven you for all that you have done, the Lord God declares."
63 leswaku u tsundzuka, u khomiwa hi tingana,+ u nga ha tlheli u va ni xivangelo xo pfula nomu+ wa wena hikwalaho ka ku tsongahatiwa ka wena, loko ndzi ku rivalela+ eka hinkwaswo leswi u swi endleke,' ku vula Yehovha, Hosi leyi Lawulaka."