Leviticus 23:1-3

1The Lord spoke to Moses:

2“Speak to the Israelites and tell them: These are my appointed times, the times of the Lord that you will proclaim as sacred assemblies.

3“Work may be done for six days, but on the seventh day there is to be a Sabbath of complete rest, a sacred assembly. You are not to do any work; it is a Sabbath to the Lord wherever you live.