And if the way be too long for you, so that you are not able to carry it, because the place is too far from you which Hashem your God shall choose to set His Name there, when Hashem your God blesses you.
English: "You are not able to carry it" — Rav Bibi said in the name of Rav Asi: From where do we know that pure ma’aser sheni may be redeemed even one step outside the wall? From the verse "for you are not able to carry it."
On the daf / in context: Once the produce has left the walls of Yerushalayim, even by a single step, it may be redeemed.
Type of Learning
Derash on the verse (Bava Metzia) — redemption is permitted one step outside the wall.
What Is Learned
Pure ma’aser sheni may be redeemed as soon as it is taken even one step outside the wall of Yerushalayim.