In Pesachim 23a, the gemara (in the name of Rav Papa) derives from Numbers 18:27 that the prohibition of terumah to non-priests only applies to eating and drinking, but not to other forms of ...
(Lomdus alert: this question is not for beginners.) In Maseches Demai (5:10-11) we learn that taking teruma from a vadai (=untithed produce) on demai (=possibly untithed produce) does not work, even ...
In Yevamot 6:2, we are told that one who has sexual intercourse with various types of women will "invalidate" them. The language is as follows: וכן הבא על אחת מכל העריות שבתורה או פסולות כגון ...