Midrasz do Kapłańska 25:31

1) (Vayikra 25:31) ("And the houses of courtyards, which have no wall roundabout; with the field of the land shall it be reckoned. Redemption shall there be for it, and on the Yovel it shall go out.") "which have no wall roundabout": What is the intent of this? Why need it be written "And the houses of courtyards"? (i.e., Let it simply be stated "And houses which have no wall roundabout.") (To teach us) that even if they have a wall, they are perceived as if they do not. And how many are they? Two courtyards of two houses each. If there were three courtyards of two houses each (surrounded by a wall), they are regarded as houses of a walled city.

1) (Vayikra 25:31) ("And the houses of courtyards, which have no wall roundabout; with the field of the land shall it be reckoned. Redemption shall there be for it, and on the Yovel it shall go out.") "which have no wall roundabout": What is the intent of this? Why need it be written "And the houses of courtyards"? (i.e., Let it simply be stated "And houses which have no wall roundabout.") (To teach us) that even if they have a wall, they are perceived as if they do not. And how many are they? Two courtyards of two houses each. If there were three courtyards of two houses each (surrounded by a wall), they are regarded as houses of a walled city.

2) "with the field of the land shall it be reckoned": Just as a field of the land (i.e., a field of holing) is released by Yovel and by deducting money (towards its redemption), so, this too. (In that case) I might think that just as a field of the land may not be redeemed in less than two years, so, this. It is, therefore, written "Redemption shall there be for it" — immediately.