Num Numbers, chapter Book of Numbers, chapter 15
Then it shall be, that, when ye eat of the lechem HaAretz, ye shall offer up a terumah unto Hashem. Exo 23:15Ye shall offer up a challah (loaf, cake) of the first of your kneading for a terumah; as ye do the terumat goren (gift of the threshing floor), so shall ye set it aside. Neh 10:38; Lev 23:10Of the first of your kneading ye shall give unto Hashem a terumah in your dorot.