Indeed, you are to them like a singer of love songs with a beautiful voice, who skillfully plays an instrument. They hear your words but do not put them into practice.
KJV
And, lo, thou [art] unto them as a very lovely song of one that hath a pleasant voice, and can play well on an instrument: for they hear thy words, but they do them not.
ASV
And, lo, thou art unto them as a very lovely song of one that hath a pleasant voice, and can play well on an instrument; for they hear thy words, but they do them not.