'Undone' in the Bible

No one in it is weary or stumbles,None slumbers or sleeps;Nor is the belt at its waist undone,Nor its sandal strap broken.

“I will lead the blind by a way they do not know,In paths they do not know I will guide them.I will make darkness into light before themAnd rugged places into plains.These are the things I will do,And I will not leave them undone.”