Hallel on the Seder Night
The Rambam in Hilchos Chanuka (3:6) says: ולא הלל חנוכה בלבד, הוא שמדברי סופרים, אלא קריאת ההלל לעולם מדברי סופרים, בכל הימים שגומרין בהן את ההלל Not only is hallel on Chanuka miderabonon but reading hallel is always miderabonon on all days when we complete hallel. The ra’avad asks: אמר אברהם ויש בהם עשה מדברי קבלה השיר יהיה לכם How can the Rambam say that hallel is always derabonon ? Sometimes the chiyuv to say hallel is more than a miderabanan , it is from the neviim, as it says in Yeshaya (30:29): הַשִּׁיר יִהְיֶה לָכֶם, כְּלֵיל הִתְקַדֶּשׁ-חָג The possuk is talking about the downfall of Sancheriv, and says that when Sancheriv is destroyed, the benei Yisroel will say shiroh as on the first night of Pesach. You see from here that the chiyuv to say hallel on the seder night is midivrei neviim , not simply miderabonon ? The Brisker Rov (Hilchos Chanuka, 3:6) answers as follows: The Ran at the end of the second perek of Megilla asks why we do not say a beracha when we ...