ראשית דגנך, "the first fruits of your corn harvest.⁠" No quantity has been mentioned as adequate for the amount of fruit to be given to the priest as this gift. It suffices that what is left over is recognizable as such. In other words, the farmer must not donate his entire corn harvest, or grape harvest to a priest or priests. This is why the sages in the tractate Chulin, folio 137, state that even a single husk of corn is considered as fulfillment of this commandment, although the sages on their own gave guidance when they said if one gives the priest one sixtieth of the harvest one is considered a miser, when one gives one fiftieth one is considered average, whereas when one gives one fortieth, one is considered generous. (Compare Mishnayot T'rumot, chapter 4 mishnah 3.) The Mishnah there finds a hint in scripture for these measures. The prophet Ezekiel 45,13, writes: ששית האיפה מחומר שעורים, "one sixtieth of an eyphah from a chomer of wheat. Seeing that the measure eyphah equals three sa-ah of the measure known as סאה, half, half a סאה, from thirty סאה equals one sixtieth. There is also a hint in scripture that a generous measure is considered one fortieth of one's harvest when Ezekiel continues by writing: וששיתם האיפה מחומר השעורים, "you are to take a sixth of an eypha from a chomer of barley.⁠¹ The word ששיתם, is to be understood as "two sixths.⁠" Our author refers us to Numbers 31,30 where the distribution of the loot from the Midianite campaign goes into further detail, from which one fiftieth is considered as average. In addition, the very word תרומה, looked at closely, really means: "two one hundreds.⁠" It could be read as תרי מאה, "two one hundreds.⁠"

וראשית גז צאנך תתן לו, "and you are to give him (the priest) the first of the fleece of your sheep.⁠" The Talmud tractate Chulin folio 136, states that the minimum amount of such fleece is to be sufficient for the recipient to weave a belt for himself.