Leviticus 23:2-4

2“Speak to the children of Israel, and say to them: ‘The feasts of the Lord, which you shall proclaim to be holy convocations, these are My feasts.

3‘Six days shall work be done, but the seventh day is a Sabbath of solemn rest, a holy convocation. You shall do no work on it; it is the Sabbath of the Lord in all your dwellings.

4‘These are the feasts of the Lord, holy convocations which you shall proclaim at their appointed times.