Isaiah
Isaiah 30:21ESV·traditional attribution

And your ears shall hear a word behind you, saying, “This is the way, walk in it,” when you turn to the right or when you turn to the left.

John Calvin Reformed @genevareformer

21. Then shall thine ears hear. It was indeed no despicable promise which he made of an abundant produce of the fruits of the earth, but the chief ground of gladness and joy is, when God restores to us pure and sound doctrine; for no scarcity of wheat ought to terrify and alarm us so much as a scarcity of the word; and indeed, in...

Matthew Henry Presbyterian @wholebiblehenry

The closing words of the foregoing paragraph (You shall be left as a beacon upon a mountain) some understand as a promise that a remnant of them should be reserved as monuments of mercy; and here the prophet tells them what good times should succeed these calamities.

Commenting on Isaiah 30:18-26

John Gill Reformed Baptist @doctorgill

And thine ears shall hear a word behind thee,.... Which may be said in reference to the backsliding and declining state of the people, Isa 30:11 and is thought by some to be an allusion to schoolmasters, who stand behind their scholars, or at their backs, to guide, teach, and instruct them; and by others to shepherds following their flocks, who, when they observe any...