Mishnayos Nazir Perek 6 Mishnah 2

And furthermore, a nazirite is liable to receive lashes for consuming wine by itself, and for grapes by themselves, and for ḥartzannim by themselves, and for zaggim by themselves, as each of these is forbidden separately by the Torah. Rabbi Elazar ben Azarya says: He is liable only if he eats an olive-bulk that includes at least two ḥartzannim and one zag, in accordance with the verse “From ḥartzannim to zag” (Numbers 6:4), where the first term is in the plural and the second in the singular. The mishna discusses the meaning of these terms: Which parts are ḥartzannim and which are zaggim? The ḥartzannim are the outside parts, the skin of the grape, while the zaggim are the inner parts, the seeds. This is the statement of Rabbi Yehuda. Rabbi Yosei says: The opposite is the case and this is the mnemonic so that you should not err: It is like a bell [zog] worn by an animal, in which the outer part, which corresponds to the skin of a grape, is called zog, and the inner portion of the bell, the clapper, which corresponds to the seeds in a grape, is called inbal.