Exodus 31:15-17

International Standard Version

¹⁵ Work may be done for six days, but the seventh day is a Sabbath of complete rest, holy to the Lord. Whoever does work on the Sabbath is certainly to die. ¹⁶ The Israelis are to keep the Sabbath to make the Sabbath observance a perpetual covenant from generation to generation. ¹⁷ It is a sign forever between me and the Israelis, because the Lord made the heavens and the earth in six days, but on the seventh day he rested and was refreshed.’”