The Gemoro (Megilah 14a) says Kriasa zu Hilila. Reading the Megillah is the saying of Hallel. We don’t say Hallel on Purim, because by reading the Megilah, we are praising Hashem.
The Meiri says, if someone doesn’t read (hear) the Megillah, he must say Hallel on Purim.
The Gemoro (18b) says that R.Mier didn’t have a Megillah on Purim, so he wrote one by heart. R. Yuda Osad zt”l asked the Chasam Sofer (Shu”t O.Ch. 192) Why couldn’t he have said Hallel instead of writing a whole Megilla.
The Chasam Sofer answered him a Tirutz:
I can’t understand these two Gedolim. What’s the Kushya?
The Gemoro only says ,by reading the Megillah you were
Yotze Hallel ,and not that by saying Hallel were you Yotze
A Freilichen Purim
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