Bamidbar 28:16-18

Orthodox Jewish Bible

¹⁶ And in the fourteenth day of the chodesh harishon (first month i.e., Nisan) is the Pesach to Hashem.

¹⁷ And in the fifteenth day of this month is a Chag (i.e., Chag HaMatzot): shivat yamim shall matzot be eaten.

¹⁸ In the yom harishon shall be a mikra kodesh (holy convocation); ye shall do no manner of melekhet avodah therein;