[Avodah] 5th seder cup

[Michael Makovi]

I recall hearing that Rabbi Menachem Kasher says that since we have
returned to the Land, we should drink the fifth cup for the fifth
expression of geula, viz. returning to the land. Does anyone know
where he says to do this? The Shulchan Aruch says that if you drink
the fifth, it is to be done in Hallel (but I forget where in Hallel -
??), but one person this Pesach
opined that ha-shana ha-ba'a b'yerushalayim ha-bnuya is a
particularly fitting place.

Mikha'el Makovi