Rashi on Isaiah
When Torah shall emanate from Me The words of the prophets are Torah, and the judgments shall eventually mean tranquility and rest for the peoples for whom I will turn a pure language to serve Me.
Ibn Ezra on Isaiah
Hearken unto me. The first person in this verse refers to God.
Rashi on Isaiah
I will give [them] rest Heb. אַרְגִּיעַ, I will give them rest.