The leaves, the shoots, the water of vines, and the buds are permitted in orlah and in reva'i, and in [regard to] a nazir, but they are forbidden in an asheirah. R' Yose says: The buds are forbidden, because it is fruit. R' Eliezer says: [If] one curdles [milk] with sap of orlah, it is forbidden. Said R' Yehoshua: I have heard explicitly that [if] one curdles with sap of leaves, [or] with sap of roots, it is permitted; with the sap of unripe fruit, it is forbidden, because they are fruit.