Peah 7:4-5
Peah 7:4
Olelet refers to grapes that are on a stalk without (a) the clusters being one on top of the other and (b) looking like they are dripping off the stalk. (In other words, it is an underdeveloped stalk.) If the stalk has either (a) or (b), it remains the property of the land owner. If the status of the stalk is in question, it goes to the needy. Regarding olelet in the joint where the grape cluster is attached to the stalk, if it comes off with the cluster it goes to the owner, otherwise it goes to the needy. Rabbi Yehuda says that a single grape is the same as a cluster (and belongs to the owner), while the Sages say it is olelet (and goes to the needy).
Peah 7:5
If a person cuts grape vines to thin them out when they’re too thick, he may remove both those that will go to him and those that will go to the needy; this is the opinion of Rabbi Yehuda. Rabbi Meir says he may only remove vines whose fruit will go to him but not those whose fruit will go to the needy.