Leviticus 23:2-4

New Revised Standard Version, Anglicised Catholic Edition

² Speak to the people of Israel and say to them: These are the appointed festivals of the Lord that you shall proclaim as holy convocations, my appointed festivals.

The Sabbath, Passover, and Unleavened Bread

³ For six days shall work be done; but the seventh day is a sabbath of complete rest, a holy convocation; you shall do no work: it is a sabbath to the Lord throughout your settlements.

⁴ These are the appointed festivals of the Lord, the holy convocations, which you shall celebrate at the time appointed for them.