Cross reference
Leviticus 16:31
31 It is a Sabbath of solemn rest to you, and you shall afflict your souls; it is a statute forever.
Leviticus 23:32
32 It shall be a Sabbath of solemn rest for you, and you shall deny yourselves. In the ninth day of the month at evening, from evening to evening, you shall keep your Sabbath."
Isaiah 58:5
5 Is such the fast that I have chosen? the day for a man to afflict his soul? Is it to bow down his head as a rush, and to spread sackcloth and ashes under him? will you call this a fast, and an acceptable day to Yahweh?
Exodus 31:15
15 Six days shall work be done, but on the seventh day is a Sabbath of solemn rest, holy to Yahweh. Whoever does any work on the Sabbath day shall surely be put to death.
Exodus 35:2
2 'Six days shall work be done, but on the seventh day there shall be a holy day for you, a Sabbath of solemn rest to Yahweh: whoever does any work in it shall be put to death.
Leviticus 25:4
4 but in the seventh year there shall be a Sabbath of solemn rest for the land, a Sabbath to Yahweh. You shall not sow your field or prune your vineyard.
Isaiah 58:3
3 Why have we fasted, [say they], and you don't see? [why] have we afflicted our soul, and you take no knowledge? Behold, in the day of your fast you find [your own] pleasure, and exact all your labors.