Pesahim 35a and Pesahim 35b, the five grains that qualify for use as matzah on Pesah, and other issues that could get in the way of using a matzah for the mitzvah, such as not tithing it properly.
Pesahim 35a and Pesahim 35b, the five grains that qualify for use as matzah on Pesah, and other issues that could get in the way of using a matzah for the mitzvah, such as not tithing it properly.