תלמוד על בבא בתרא 199:17

This does not follow Rebbi Eliezer, for Rebbi Eliezer said that walking acquires, as it was stated: ³⁴⁴Babli Baba batra 100a. One assumes either that the field is ownerless or that the acquirer has a claim of possession that would give him squatter’s rights; cf. Ketubot 5:5, Note 100.
In R. Eliezer’s opinion, the rules of acquisition of a Canaanite slave are not identical with those for real estate; he will reject deriving legal rules from a verse in the Prophets. If one walked across a field in length and breadth, he acquired up to the place he walked to, the words of Rebbi Eliezer. But the Sages say that he did not acquire up to the moment he acted in possession³⁴⁵He performed some agricultural work on the property.. Everybody agrees that if somebody sells a path to another, when the latter went, he acquired. What is the reason? “Arise, walk in the Land in length and breadth, for I shall give it to you.³⁴⁶Gen. 13:17.”