Rabbi Moshe ben Maimon’s (Rambam) commentary was the first to be written on the entire Mishnah. The commentary was written by Rambam in Judeo-Arabic, and has been translated into Hebrew. He started working on it at age 23 while living in Spain, and completed it seven years later after settling in Egypt. It offers a running commentary on the Mishnah, and often includes a Halachic ruling based on the Talmud's conclusion.