**The Rambam**, Rabbeinu Moshe bar Maimon [(from the city of Cordoba, Semag in the introduction) (in Sepharad, Seder HaKabbalah chapter 42b). Yuchsin writes in discourse 5, later generations.] He was born on the eve of Pesach, Shabbat day, an hour and a third after midday in the year 4891. And he wrote in the commentary on the Mishnah: I gathered all the books that came to my hands from the commentaries of my father, my master, my teacher, and others up to Rabbi Yosef HaLevi, for the heart of that man was fearful, and like him there was no king before him.
And he also wrote: I, Moshe bar Maimon the judge, bar Yosef the sage, bar Yitzchak the judge, bar Yosef the judge, bar Ovadiah the judge, bar Shlomo, son of the Rabbi, Rabbi Ovadiah the judge, began to compose the commentary on the Mishnah when I was 23 years old [(and Seder HaKabbalah chapter 42b writes some say he was 18)] and I completed it in Egypt when I was 30, which was 1479 to documents (which is 4927). [Thus he was born in 4897 and according to the calculation that he was born in 4891 it does not match, for 4891 plus 30 is 4920. Seder HaKabbalah writes that at the end of the commentary on Tractate Rosh Hashanah by the Rambam is the signature of Rabbi David, son of his son, who says: "The Rambam my grandfather was born on the 14th of Nisan, 1445 to documents (and according to this he was born in 4894) in the city of Cordoba and died in 1516 to documents (it is found he lived about 70 years).
And my father, my master, his son was born in 1066 to documents (printing error, should read 496, and he died in 1066, thus I have noted in my Seder HaKabbalah and it seems so in Meor Einayim). And I, David, son of his son, was born to my father in Egypt in 1535 to documents. And I saw written that he was from the seed of Rabbeinu HaKadosh, thus concluded. And in Dorot Olam it is written that he completed the commentary on the Mishnah in 4927 and began in 4919.
And he composed the book of the Yad (in the year 4931 and completed it in 4939. Tzeda LaDerech) 12 years after the commentary on the Mishnah, as is written in Laws of Sanctification of the Month. And in Seder HaKabbalah he writes he composed the book Mishneh Torah in 4936, 1107 to the destruction and 1187 to documents, and that was a Sabbatical year, the end of the seventh cycle, year 21 of the Jubilee. (And in the Shita it is written 4936.
And I saw in the introduction to the Yad, z"l, in this year which was 4936, 1108 to the destruction). And Yuchsin writes in Seder HaKabbalah of the Rema: in the year 4936 he began his great and wondrous composition called Mishneh Torah, and in 4948 it was completed. And in Seder HaKabbalah chapter 42b in the name of Yesod Olam, that he worked on it for five consecutive years. And the book Yuchsin says that he composed the great composition 12 years after the commentary on the Mishnah.
And I saw in Migdal Oz, Laws of Sanhedrin chapter 2, that the Rambam worked for several years on the composition and made many copies until he was enlightening the laws with the power of the Talmud or supports. And the Raavad author of the Criticisms testifies in Laws of Kilayim chapter 10 in a critique that he did a great work in adding the words of the Babylonian Talmud, Jerusalem Talmud, and Toseftot.
Some say when the Rambam heard all these words of thorns and humiliations in the criticisms that the Raavad made against him, he said about him: "They said to the master who was in Pisqira that if you begin you will not finish," and they say that the Raavad did not complete his year. And in Responsa Rashbatz section 6: I heard that the Rambam saw the criticisms of the Raavad and said "No one has ever defeated me except one craftsman," but I have not seen this in any place, thus concluded.
And I say that this is false, for if he had seen them he would have responded to them. And what the Rashbatz writes in a responsum to the Raavad, we find that he said about the Rambam that he was a youth and we are elders, thus concluded. If this is true, it could be that the Raavad ben Dior the Elder, author of the book HaKabbalah, was the one, for perhaps he was still alive in the days of the Rambam's composition (see year 4920)].