An uncircumcised male may not eat Terumah (the priestly tithe), as well as all other holy foods which he is precluded from eating.
Though there is no explicit verse stating this prohibition, our Sages extrapolated this precept from the verses, and asserted that this is counted as one of the 613 mitzvot.
The rabbis added to this prohibition, forbidding a circumcised individual who extended his foreskin so that it appears that he is uncircumcised from partaking of any of these holy foods.
