פירוש על קידושין 54:2

According to R. Aha son of R. Ika the proof from the baraita’s rule is that one obviously can acquire ten cows tied together by one cord. So too one can acquire ten pieces of land by buying one of them.

Someone unknown responded to R. Aha telling him his comparison is not justified. In the case of the cows, he has one tie connected to all of them. In the case of the land, there is nothing connecting him to the other pieces of land.