Seder HaDoros (year 4927) quotes Maimonides as saying that he began writing his commentary on the Mishna when he was 23 years old, and published it when he was 30.
Hentet 22. januar 2013.  Seder HaDoros (år 4927) citerer Maimonides for at sige, at han begyndte at skrive sin kommentering af Mishna, da han var 23 år, og offentliggjorde den, da han var 30.