And thine ears shall hear a word behind thee, saying, This is the way, walk ye in it, when ye turn to the right hand, and when ye turn to the left. When ye turn to the right hand, and when ye turn to the left "Turn not aside, to the right or to the left" - The Syriac Chaldee, and Vulgate, translate as if, instead of כי־וכי ki-vechi, they read לא־ולא lo-velo.
Related Commentaries of Isaiah 30:21
Isaiah 30:21
21 And thine ears shall hear a word behind thee, saying, This is the way, walk ye in it, when ye turn to the right hand, and when ye turn to the left.