«فَإِنْ أَفَادَ الِامْتِدَادَ لَا تَدْخُلُ الْغَايَةُ فِي الْحُكْمِ»
Where ila indicates extension, the endpoint is not itself included in the ruling.
For example, purchasing an area “up to this wall” identifies the wall as the boundary of the purchased space. The wall itself is not established as part of the sale merely by that wording.
Extending property to a boundary and transferring the boundary object are separate claims; the latter needs its own basis.