Related על בבא קמא 137:11

The homeowner may not take gleanings from the poor (i.e., to which the poor are entitled) in exchange for [permitting them to] glean from the sheaves. Rabbi Yehudah says (see Y. Maas. Sheni V.1.11, following Guggenheimer tr.), in the morning, the farmer has to say: Everything the poor collected (alt., "will collect") from the sheaves, behold, it shall be [considered] ownerless. Rabbi Dosa says, in the evening. But the Sages say, a [declaration of abandonment] under duress is [alt., "is not" (see Hagahot HaGR"A)] an abandonment, for we are not responsible for [the actions of] tricksters.