ועתה כתבו לכם את השירה הזאת
The Rambam in Hilchos Tefillin, Mezuzah V’Sefer Torah (7:1) writes, “It is a mitzvah from the Torah incumbent upon each and every Yid to write a Sefer Torah for himself, as it says in the pasuk, “V’atah kisvu lachem es ha’Shirah ha’zos.” (Since one cannot write parshiyos, chapters of the Torah, at various intervals and put them together, the exhortation to write Shiras Haazinu implies that it should be written as part of the entire Torah.) “Even if his forbears left him a Sefer Torah, he still has a mitzvah to write his own Sefer Torah. If he writes it…
