Menachos 2:1-2

Menachos 2:1

If the kohein took the handful intending to eat the rest of the offering or to burn the handful the next day, Rabbi Yosi agrees that the offering is piggul (detestable) and one incurs kareis. If he intended to burn the frankincense the next day, Rabbi Yosi says that the offering is invalid but one does not incur kareis; the Sages say that it is piggul and one does incur kareis. The Sages asked Rabbi Yosi how this is any different from animal sacrifices (in which intention to burn the fats after the proper time renders the sacrifice piggul). He replied that the blood, flesh and fats of animal offerings are all one thing but frankincense is not part of the flour offering.

Menachos 2:2

If the kohein slaughtered the two Shavuos lambs intending to eat one of the loaves the next day, or if he burned the two dishes of frankincense of the showbread intending to eat one of the rows of showbread the next day, Rabbi Yosi says that the loaf or row about which he had improper intention is piggul and he incurs kareis for it, while the other loaf or row is invalid but he does not incur kareis for it. The Sages say that both are piggul and he incurs kareis for both of them. If one of the loaves or one of the rows is rendered ritually unclean, Rabbi Yehuda says that both loaves or both rows of showbread are taken to the place of burning because public sacrifices cannot be divided; the Sages say that what is unclean is treated as unclean but what is clean may be eaten.