Parshas Haazinu
In parshas Va’yelech, we are commanded kisvu lachem es ha’shira ha’zos, write down this song. Rashi says, this, is referring to Shiras Ha’azinu. What are the halachic parameters of this mitzva? The Rambam writes that from these words we derive the commandment to write an entire Sefer Torah which contains the shira of Ha’azinu because one must not write isolated portions of the Torah. Effectively, the Rambam understands that one must write an entire Sefer Torah to halachically facilitate the writing of Shiras Ha’azinu. This is worth reflecting upon.