[If] one says: “The terumah of this pile is [designated] within [the pile]”; or, “Its tithes are [designated] within it”; [or,] “The te-rumas maaser of this [pile] is within it,” R' Shimon says: He has effected a designation. But the Sages say: Only if he says, “[The terumah] is in [the pile's] northern [side]” or “at its southern [side].” R' Elazar Chisma says: [If] one says, “The terumah for the pile is from it,” he has effected a designation. R' Eliezer ben Yaakov says: [If] one says, “A tenth of this maaser [rishon] is made terumas maaser for it,” he has effected a designation.