Shemot 12:17-19

Orthodox Jewish Bible

¹⁷ And ye shall be shomer to safeguard the matzot; for on this very day I brought your tzva’os out of Eretz Mitzrayim; therefore shall ye be shomer over this day in your generations by a chukkat olam.

¹⁸ In the first month, on the fourteenth day of the month at erev, ye shall eat matzot, until the one and twentieth day of the month at erev.

¹⁹ Shivat yamim shall there be no se’or (yeast, leaven) found in your batim (houses); whosoever eateth that which is leavened, even that nefesh shall be cut off from Adat Yisroel, whether he be a ger, or native born in ha’aretz.