Tosefta sur Les Nombres 18:27

One who takes terumah from grapes to be made into raisins (Ter. 1:9), or figs to be made into dried figs, or pomegranates to be made into dried pomegranates (פֶּרֶד not כרי, see Jastrow), it is [valid] terumah and he need not take terumah a second time. Rabbi Eliezer says, Beit Shammai say that he need not take terumah a second time, and Beit Hillel say that he needs to take terumah a second time. Beit Hillel said to Beit Shammai, behold, it says (Num. 18:27), "[your terumah will be reckoned] like fully-fermented [grapes] from the vat" (see Ter. 1:10). He does not take terumah of this (i.e., of dried fruit) from the vat. Beit Shammai said back to them, behold, it says (Lev. 27:30), "And every tithe [of the land, whether from the seed of the land [or] the fruit of the tree, is for God, it is holy to God." If you say, that he needs to take terumah a second time, therefore [the first terumah] will not remain holy to God.