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The Mishnah (17a) records a dispute between the Rabanan and Rebbi Eliezer in the case of one who has improper intent about an item that is not normally eaten. The Rabanan maintain that when a Kohen performs the Kemitzah of a Minchah with intent to eat or to burn, Chutz l'Zemano, a part of the Minchah that is not normally eaten or burned, the Korban remains valid. Rebbi Eliezer says that the Kohen's intent invalidates the Korban.
The Gemara explains that Rebbi Eliezer's reasoning is based on the verse, "v'Im He'achol Ye'achel" -- "And if he plans to eat..." (Vayikra 7:18). The verse's usage of two words for "eat" ("He'achol Ye'achel") implies that it refers to two "eatings." One eating is the Mizbe'ach's consumption of the Korban, and the other is man's act of eating the meat of the Korbam. A thought about either one constitutes a thought of "eating" which renders a Korban invalid. Accordingly, if one has intent to eat, Chutz l'Zemano, limbs that are normally burned on the Mizbe'ach, the Korban is invalid.