Exodus 12:16-18

Revised Standard Version

¹⁶ On the first day you shall hold a holy assembly, and on the seventh day a holy assembly; no work shall be done on those days; but what every one must eat, that only may be prepared by you. ¹⁷ And you shall observe the feast of unleavened bread, for on this very day I brought your hosts out of the land of Egypt: therefore you shall observe this day, throughout your generations, as an ordinance for ever. ¹⁸ In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread, and so until the twenty-first day of the month at evening.