Pesachim 2:4-5

Pesachim 2:4

If a person accidentally eats terumah that is chometz on Passover, he must repay it and the additional fifth (the same as with any other terumah). If he ate it intentionally, he is exempt from paying (because chmoetz is worthless on Passover). He need not even pay its value for use as fuel.

Pesachim 2:5

The following species of grain can be used to make matzah to fulfill the mitzvah on Passover: wheat, barley, rye, oats and spelt. The mitzvah can be performed with demai (doubtfully-tithed produce), first tithe from which terumah has been taken, second tithe and consecrated produce that have been redeemed and, for kohanim, challah and terumah. One may not use tevel (untithed produce), first tithe from which terumah has not been taken, or second tithe and consecrated produce that have not been redeemed. Loaves for a thanksgiving offering and the wafers for a nazir may not be used if the one who was to offer them made them himself (because they were not guarded with the possibility of Passover use in mind). If these things were made to be sold in the marketplace, they may be used for Passover (because the baker also had this possibility in mind and guarded them accordingly).