Positive Mitzvah 156
Removing the Chametz
Exodus 12:15 "But on the first day, you shall remove leaven from your houses"
This Positive Mitzvah is one of the commandments regarding the holiday of Pesach.
We are commanded to remove all leaven (Chametz) from our homes by the fourteenth day of the month of Nisan.
By removing the Chametz, we commemorate the story of Pesach when our ancestors were led out of Egypt without having any Chametz - leavened bread in their food supply for their journey.
Negative Mitzvah 197
It is forbidden to eat Chametz on Passover
Exodus 13:3 "No leavened bread shall be eaten"
This Negative Mitzvah tells us that we are forbidden to eat chametz on Pesach.
Negative Mitzvah 198
It is forbidden to eat any mixtures containing Chametz on Passover
Exodus 12:20 "You shall eat nothing leavened"
We are not allowed to eat any foods that contain Chametz mixed in with them.