Tosefta for Terumot 3:5
הָאוֹמֵר, תְּרוּמַת הַכְּרִי זֶה בְּתוֹכוֹ, וּמַעַשְׂרוֹתָיו בְּתוֹכוֹ, תְּרוּמַת מַעֲשֵׂר זֶה בְּתוֹכוֹ, רַבִּי שִׁמְעוֹן אוֹמֵר, קָרָא שֵׁם. וַחֲכָמִים אוֹמְרִים, עַד שֶׁיֹּאמַר בִּצְפוֹנוֹ אוֹ בִדְרוֹמוֹ. רַבִּי אֶלְעָזָר חִסְמָא אוֹמֵר, הָאוֹמֵר, תְּרוּמַת הַכְּרִי מִמֶּנּוּ עָלָיו, קָרָא שֵׁם. רַבִּי אֱלִיעֶזֶר בֶּן יַעֲקֹב אוֹמֵר, הָאוֹמֵר, עִשּׂוּר מַעֲשֵׂר זֶה עָשׂוּי תְּרוּמַת מַעֲשֵׂר עָלָיו, קָרָא שֵׁם:
If one says: “The <i>Terumah</i> of this pile is within it,” or, “its tithes are within it,” or, “the <i>Terumat Ma'aser</i> [a portion of the tithes that are given to the priest] is within it,” Rabbi Shimon says: he has [thereby] designated it [as <i>Terumah</i>, tithes, or <i>Terumat Ma'aser</i>]. But the Sages say: not unless he said, “It is in the north or south of it.” Rabbi Elazar Chisma says: if one says, “The <i>Terumah</i> of this pile is taken from it for it,” he has [thereby] designated it. Rabbi Eliezer ben Yaakov says: if one says, “The tenth part of this tithe is made into <i>Terumat Ma'aser</i> for it,” he has [thereby] designated it.