Leviticus 16:31

It is to be a sabbath of solemn rest for you, that you may humble your souls; it is a permanent statute.

Leviticus 23:32

It is to be a sabbath of complete rest to you, and you shall humble your souls; on the ninth of the month at evening, from evening until evening you shall keep your sabbath.”

Isaiah 58:5

“Is it a fast like this which I choose, a day for a man to humble himself?
Is it for bowing one’s head like a reed
And for spreading out sackcloth and ashes as a bed?
Will you call this a fast, even an acceptable day to the Lord?

Exodus 31:15

For six days work may be done, but on the seventh day there is a sabbath of complete rest, holy to the Lord; whoever does any work on the sabbath day shall surely be put to death.

Exodus 35:2

For six days work may be done, but on the seventh day you shall have a holy day, a sabbath of complete rest to the Lord; whoever does any work on it shall be put to death.

Leviticus 25:4

but during the seventh year the land shall have a sabbath rest, a sabbath to the Lord; you shall not sow your field nor prune your vineyard.

Isaiah 58:3

‘Why have we fasted and You do not see?
Why have we humbled ourselves and You do not notice?’
Behold, on the day of your fast you find your desire,
And drive hard all your workers.

Treasury of Scripture Knowledge

Summary

It shall be a sabbath of rest unto you, and ye shall afflict your souls, by a statute for ever.

Bible References

General references

Leviticus 23:32
It is to be a sabbath of complete rest to you, and you shall humble your souls; on the ninth of the month at evening, from evening until evening you shall keep your sabbath.”
Leviticus 25:4
but during the seventh year the land shall have a sabbath rest, a sabbath to the Lord; you shall not sow your field nor prune your vineyard.
Exodus 31:15
For six days work may be done, but on the seventh day there is a sabbath of complete rest, holy to the Lord; whoever does any work on the sabbath day shall surely be put to death.
Exodus 35:2
For six days work may be done, but on the seventh day you shall have a holy day, a sabbath of complete rest to the Lord; whoever does any work on it shall be put to death.