Vayikra 23:5-7

Orthodox Jewish Bible

⁵ In the fourteenth day of the first month at twilight is Hashem’s Pesach.

⁶ And on the fifteenth day of the same month is the Chag HaMatzot unto Hashem; shivat yamim ye must eat matzot.

⁷ In the Yom HaRishon ye shall have a mikra kodesh; ye shall do no melekhet avodah therein.