NET
21 You will hear a word spoken behind you, saying, “This is the correct way, walk in it,” whether you are heading to the right or the left.
Darby
21 And when ye turn to the right hand or when ye turn to the left, thine ears shall hear a word behind thee, saying, This is the way, walk ye in it.
KJV
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.