Exodus 12:20

מחמצת לא תאכלו THAT WHICH LEAVENETH YE SHALL NOT EAT — Here we have the prohibition regarding eating שאור (that which causes food to become leavened). כל מחמצת [YE SHALL NOT EAT] ANYTHING THAT LEAVENETH — The use of the word כל, anything (even in the smallest degree), is intended to include food with which it (שאור) is mixed (Mekhilta). בכל מושבתיכם תאכלו מצות IN ALL YOUR HABITATIONS SHALL YE EAT UNLEAVENED BREAD — This statement is intended to teach that it (the unleavened bread which you must eat on the first night of Passover) must be fitted to be eaten in all your habitations, thus excluding leavened bread which forms “the second tithe” and the unleavened meal cakes brought with the thanksgiving offering (which might be eaten only within the walls of Jerusalem) (Mekhilta).

You shall eat nothing leavened; in all your habitations shall you eat unleavened bread.

כׇּל־מַחְמֶ֖צֶת לֹ֣א תֹאכֵ֑לוּ בְּכֹל֙ מוֹשְׁבֹ֣תֵיכֶ֔ם תֹּאכְל֖וּ מַצּֽוֹת׃ {פ}