Halachah 1 — Obligation to Wash Hands
Anyone who eats bread over which hamotzi is recited must wash his hands before and after eating.
This applies even if:
- the food is not sacred,
- the hands appear clean,
- and there is no known ritual impurity.
Similarly, one must wash hands before eating any food dipped in liquid.
Halachah 2 — Blessing Over Washing
Before washing hands for:
- eating bread,
- reciting Shema,
- or prayer,
one recites:
“…Who commanded us concerning the washing of hands.”
This is a Rabbinic mitzvah, grounded in the Torah’s command to obey the Sages.
No blessing is recited over washing after eating, since it was instituted as a protective measure—yet this makes its observance more critical.
Halachah 3 — Optional and Obligatory Washings
Washing between meal courses is optional.
There is no obligation to wash before or after eating fruit; doing so is considered arrogant.
Washing after eating is required because of concern for dangerous salt that could harm the eyes.
In an army camp:
- washing before eating is waived,
- washing after eating remains obligatory due to danger.
Halachah 4 — Extent and Water Quantity
Hands must be washed up to the wrist.
Minimum water required: one revi’it per pair of hands.
Anything that constitutes an intervening substance invalid for immersion also invalidates hand‑washing.
Any liquid valid for a mikveh may be used for washing hands.
Halachah 5 — Immersion vs. Pouring
If one immerses his hands in a valid mikveh, no further washing is needed.
Immersion in:
- insufficient water,
- poured water collected on the ground,
does not purify hands.
Poured water purifies only when poured directly over the hands.
Halachah 6 — Four Requirements for Washing
Valid hand‑washing requires attention to:
- The water (it must be suitable),
- The quantity (a revi’it),
- The vessel,
- Human action (the water must come from human pouring).
Halachah 7 — Invalid Water
Water is invalid if:
- its color changed,
- it was left uncovered and became unsafe to drink,
- it was used for labor,
- or it spoiled to the point animals would not drink it.
This applies whether the water is in a vessel or in the ground.
Halachah 8 — Water Used for Work
Any water used for a task is invalid.
Examples:
- washing dirty utensils,
- dipping bread,
- water in which crackers were dipped.
Water used only for clean utensils or new utensils remains valid.
Halachah 9 — Water Unfit for Drinking
Water that a dog would not drink:
- bitter,
- salty,
- foul,
- very murky,
may not be used for washing if in a vessel.
If such water is in the ground, hands may be immersed in it.
The Tiberias hot springs:
- valid for immersion in place,
- invalid once drawn or diverted.
Halachah 10 — Pouring Technique
Water may be poured:
- all at once,
- or gradually.
Multiple people may wash from a single pouring if:
- space is left for water flow,
- each receives a revi’it.
Halachah 11 — Valid and Invalid Vessels
Invalid washing implements include:
- vessel sides,
- broken vessels,
- makeshift fragments.
Modified coverings or wine‑pouches may be used.
Hands themselves are not vessels.
Halachah 12 — Acceptable Vessels
All whole vessels—even crude ones—may be used.
Invalid vessels include those that:
- cannot hold a revi’it,
- or currently contain less than a revi’it.
Halachah 13 — Who May Pour the Water
Anyone may pour the water:
- even a minor,
- a deaf‑mute,
- a mentally incapable person.
Alternative methods (knees, tilted jug) are valid.
Even if a monkey pours the water, the washing is valid.
Halachah 14 — Human Force Required
Water flowing without direct human force is invalid.
If the water flows near enough to be clearly driven by human action, the washing is acceptable.
Halachah 15 — Doubtful Cases
In all cases of doubt—
- about the water,
- quantity,
- purity,
- or whether one washed—
the hands are considered pure.
Halachah 16 — Direction and Method
Before eating:
- hands are raised upward,
- washing may be into a vessel or the ground,
- hot or cold water is fine.
After eating:
- hands are held downward,
- washing must be into a vessel,
- scalding water is invalid.
Halachah 17 — Morning Washing for the Day
One may wash in the morning and stipulate that it apply all day if attention is maintained.
If attention is diverted, washing must be repeated as required.
Halachah 18 — Alternatives and Responsibility
One may wrap hands in cloth and eat without washing.
The eater must wash—even if someone else feeds him or he uses utensils.
Halachah 19 — Gravity of the Mitzvah
It is forbidden to feed someone who did not wash.
Treating hand‑washing lightly is severely condemned.
Even with minimal water, one must wash before eating.
Halachah 20 — Drying Hands and Immediate Grace
Hands must be dried after washing.
Eating without drying is considered eating impure bread.
After washing post‑meal:
- dry hands,
- recite grace immediately,
- no interruptions,
- even drinking water is forbidden until grace is recited.
