John Gill Commentary Jeremiah 11:6

"And Jehovah said unto me, Proclaim all these words in the cities of Judah, and in the streets of Jerusalem, saying, Hear ye the words of this covenant, and do them." — Jeremiah 11:6 (ASV)

Then the Lord said to me Again; for this is a repetition of the above order: proclaim all these words in the cities of Judah, and in the streets of Jerusalem : with a loud voice, and openly, that all may hear: saying, hear you the words of this covenant, and do them ;

which their forefathers promised, when the covenant was made with them, (Exodus 24:7) , but did not perform; hearing without doing is of little avail; not the hearers, but the doers of the law are justified; wherefore men should not be content with hearing only, (Romans 2:13) (James 1:22) .