Yahweh spoke to Moses, saying,
Speak to the children of Israel, and tell them, The set feasts of Yahweh, which you shall proclaim to be holy convocations, even these are my set feasts.
Six days shall work be done: but on the seventh day is a Sabbath of solemn rest, a holy convocation; you shall do no manner of work: it is a Sabbath to Yahweh in all your dwellings.
These are the set feasts of Yahweh, even holy convocations, which you shall proclaim in their appointed season.
In the first month, on the fourteenth day of the month at even, is Yahweh's Passover.
On the fifteenth day of the same month is the feast of unleavened bread to Yahweh: seven days you shall eat unleavened bread.