What is this Pasuk referring to?
Rashi and Rashbam: It is referring to a Yisrael himself eating the Terumah that he has designated to give to the Kohen. 1
What does "v'Hisi'u Osam Avon" mean?
Rashi: It means that they will bear their own sins. 1
Ramban: Refer to 22:15:1:2*.
Why does the Pasuk conclude "ki Ani Hashem Mekadsham".
Seforno: To teach us that the owner has only himself to blame for the ensuing punishment, since, having declared the Hekdesh, 1 he is not allowed to eat it, 2 because the Terumah was subsequently endorsed by Hashem, who personally sanctified it. 3