Haazinu

5781 Luchos Shniyos This week we read the Shirah of Haazinu. Rashi along with others learn that the obligation in the Pasuk ועתה כתבו לכם את השירה הזאת is referring to Shiras Haazinu. But the Gemara in Sanhedrin 21b learns from that Pasuk the obligation of כתיבה ספר תורה which would seem to mean that השירה הזאת in the Pasuk is referring to כל התורה כולה. The Rambam manages to explain both that really the Shirah in the Pasuk refers to Haazinu, it’s just that one can’t write פרשיות פרשיות and therefore one is required to write the whole Torah so ממילא we see that there is a Mitzvah to write the whole Torah....