Tosefta к Пеа́ 7:2

[With respect to] a cask [of oil] (alt., "olive tree" ("זית"), accord Peah 7:2) ] that [is found] against three rows [of trees] of two plots [per row], and he forgot it, it is not [considered] forgotten (see Peah 7:2). What case are we talking about? About a situation that he does not know it [i.e., the owner does not recognize [the cask (or olive tree) as distinguished], but in a situation that he does recognize it, he may run after him (i.e., after the poor person who takes possession of the cask or fallen olives under the rules of the forgotten sheaf) and [the poor person] gives it back to him, even [if he must chase after him for] one hundred amot ["אמה " not "ומאה"].