Komentarz do Izajasza 30:21

And your ears shall hear from behind you Not as you do now, that you despise My words and say, “You shall not prophesy for us true things” (verse 10), but your ears shall be bent also behind you to hear from Me, perhaps a prophet will come and instruct you the way to go, whether right or left.

And thine ears, etc. Thou wilt see thy teachers before thee, and hear the words of thy prophets and instructers, that call after thee from behind. Some explain the words thine eyes shall see and thine ears shall hear to express figuratively the seeing and understanding of the heart. תאמינו ═ חימינו; א is substituted for י as is frequently done.

When you turn to the right hand, etc.: When you are about to depart from the right way, either to the right or to the left, you will hear distinctly the words of them that show the right way.