From when is it forbidden to cut down a tree during the seventh [year]? Beis Shammai say: Every tree from when it bursts forth. Beis Hillel say: Carob trees, from when they hang; grapevines, from when they form seeds; olive trees, from when they blossom; and any other tree, from when it bursts forth. And every tree, once its [fruit] reaches the stage of tithing, one is permitted to cut it down. How much must there be on an olive tree before one is prohibited to cut it down? A quarter-[kav]. Rabban Shimon ben Gamliel says: [It] all depends on the olive tree.