Mishnà su Ezechiele 16:1

All kinds of pits can be defiled and defile but do not join together. The pits of fresh dates, even when detached [from the edible part], do join together; but those of dried dates do not join together. Accordingly, the stems of dried dates do join together, but that of fresh dates do not join together. If only part of a pit is detached, then only that part near the edible portion joins together. [Similarly] with a bone on which there is flesh, only that part that is close to the edible part joins together. [If a bone] has flesh only upon one of its sides: Rabbi Ishmael says: we take it as though [the flesh] encompasses it like a ring; But the sages say: [only] that part close to the edible part is included [as is the case] for example with savory, hyssop and thyme.