Isaiah 30:21 in the King James Version
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.
Context
20 Though the Lord may give you the bread of adversity and the water of affliction, yet your teachers won’t be hidden any more, but your eyes will see your teachers;
21 and when you turn to the right hand, and when you turn to the left, your ears will hear a voice behind you, saying, “This is the way. Walk in it.”
22 You shall defile the overlaying of your engraved images of silver, and the plating of your molten images of gold. You shall cast them away as an unclean thing. You shall tell it, “Go away!”