Related sobre Peah 6:8

When did they (i.e. the Rabbis) say [that] standing crops [that have not been forgotten] disqualify a sheaf [that was forgotten next to those standing crops from being considered Shikcha (forgotten sheaves)]? At the time when [the standing crops] were not taken in the middle (i.e. between the time when the sheaf was forgotten and remembered by the farmer), but if [the standing crops] were taken in the middle (i.e. prior to the farmer remembering that he forgot that sheaf) then it does not disqualify [that sheaf from being considered Shikcha, and the farmer cannot go back and take it for himself]. “The standing crops of his (i.e. the farmer’s) friend [that were not forgotten] disqualify his (i.e. the farmer’s) [own standing crops that were forgotten from being considered Shikcha], [the standing crops] of wheat [that were not forgotten disqualify the standing crops] of barley [that were forgotten from being considered Shikcha], [the standing crops] of a non-Jew [that were not forgotten disqualify the standing crops] of a Jew [that were forgotten from being considered Shikcha].” These are the words of Rebbi Meir. But the Chachamim (Sages) say, “[Standing crops that were not forgotten] do not disqualify [other standing crops that were forgotten], unless they were his (i.e. the farmer’s and not someone else’s) [own] and [they were] of the same kind [of crops].” Rabban Shimon Ben Gamliel says, “Just like standing crops [that were not forgotten] disqualify a sheaf [that was forgotten from being considered Shikcha], so too the sheaf [that was not forgotten] disqualifies standing crops [that were forgotten from being considered Shikcha]. And [the reason for this law] is a Kal Vechomer (derivation from minor to major) [which goes as follows]. Since standing crops by which the power of the poor person is weak [have the capability to] disqualify a sheaf [from being considered Shikcha], then for sure a sheaf by which the power of the poor person is strong should [have the capability to] disqualify standing crops.” They (i.e. the Chachamim) said [back] to him (i.e. Rabban Shimon Ben Gamliel), “Rebbi! [That is not correct, because the reverse argument can be made as well, as follows.] Just like standing crops can disqualify a sheaf by which the power of the poor person is strong [from being considered Shikcha], so too the sheaf should disqualify the standing crops by which the power of the poor person is [also] strong [for a different reason as explained in the next Tosefta] [from being considered Shikcha].”