Does the Bible Command Fasting on the Day of Atonement?
In short
No. The Hebrew word for fasting, tsom, does not appear in the Day of Atonement commands in Leviticus 16 or 23. The text says anah nephesh, humble or afflict your soul. Fasting became the customary way to do that early on, and Acts 27:9 already calls the day the Fast, so fasting is not wrong. It is a means. Humbling the soul is the command, and a fast that replaces it has missed the point.
This surprises almost everyone who checks it, including people who have kept the day their whole lives.
Read the commands in Leviticus 16 and Leviticus 23 and look for the word fast. It is not there. Something else is, and the difference between the two is the difference between a hard day and a holy one.
What the two Hebrew phrases actually mean
Scripture treats fasting as a real and good practice, never as self-denial for its own sake. The phrase used for this day is something else.
Tsom
Fasting. Deliberate abstaining from food, and sometimes water, for a set period, in order to humble oneself before God, intensify prayer, express grief, or seek His intervention.
Anah nephesh
Humble your soul. Anah: to be bowed down or brought low. Nephesh: the soul, the self, a living being, and also desire, appetite, and emotion.
Ezra 8:21 puts both ideas in one sentence: a fast was called in order to humble ourselves before God. Two separate words doing two separate jobs.
One is a means. The other is the goal.
Why would God leave the word fast out?
Here is one reasonable explanation. We default to the path of least resistance, and He made us, so He knows it.
Any deer hunter can tell you the same thing about deer. Walk a fence line and you will find one spot where the top wire sits lower. Somebody put it there. The deer will cross at that spot rather than jump six inches higher two feet away. Every time.
Give people a checklist with a minimum standard and they will find the low spot in the wire and call it obedience. If the text had said fast, a great many of us would have stopped at hungry and considered the day complete.
This is an inference, not a statement in the text. It is offered as a reason the omission might be deliberate rather than accidental.
What God says about fasting that misses the point
Isaiah 58 is the clearest passage on this, and it is uncomfortable.
The people ask why they have fasted and God has not noticed. God answers that on the day of their fast they pursue their own desire and drive their workers, that they fast for quarreling and to strike with a wicked fist. Then He asks whether bowing the head like a reed and spreading sackcloth is really the fast He chose.
Jesus described the same posture. One man in the temple announces that he fasts twice a week and tithes on all he has. The other will not lift his eyes and asks God for mercy as a sinner. Only one went home justified (Luke 18:9-14).
The pattern in both passages is identical. The practice was intact. The heart was not there.
So should you fast or not?
This is not permission to go have a cheeseburger.
Fasting is not being dismissed here. It became the practice early and for good reason. Hunger interrupts the day, removes an appetite from its usual place, and makes room for something else. Acts 27:9 shows the association was already established in the first century.
The question is what the fast is serving. If it is carrying you into humility, keep it. If it has become the entire content of the day, so that you are counting hours rather than confessing anything, then it has replaced what it was supposed to serve.
For what the day asks in place of the fast, read How Do You Observe the Day of Atonement? For the full meaning of the day, start with What Is the Day of Atonement, and What Does It Ask?
One question worth sitting with
If you kept the fast perfectly and confessed nothing, what exactly would you have kept?
Frequently Asked Questions
Does the Bible command fasting on the Day of Atonement?
The Hebrew word for fasting, tsom, does not appear in the commands for this day. Leviticus 16:29 and 23:27 instruct the people to humble or afflict their souls, using the phrase anah nephesh. Fasting became the customary practice and is referred to in Acts 27:9.
What does “afflict your souls” mean?
The phrase is anah nephesh. Anah means to be bowed down or brought low, and nephesh refers to the soul, self, appetite, and desire. Together they call for bringing the whole inner life low before God.
Is it wrong to fast on the Day of Atonement?
No. Fasting is a biblical practice that can serve humility well, and the association with this day is ancient. The concern is only that fasting can become a substitute for the humbling it was meant to support.
What does Isaiah 58 say about fasting?
God addresses people who fasted while pursuing their own interests and mistreating workers, asking whether outward affliction is the fast He chose. The passage points instead toward justice, mercy, and a humble heart.
Why do people fast on the Day of Atonement?
The practice developed early as the natural way to humble the soul, and Scripture reflects it. Acts 27:9 refers to the day as the Fast, indicating the association was well established in the first century.
Keep going
This post comes from an Oak Stone sermon.
Adam Clark works through more of this passage than there was room for here. Oak Stone Christian Church meets in Allen, Texas, and you do not need to have this figured out before you walk in. Nobody here does.