Must the revi'it of water be gathered in one place, or can one wash half a revi'it twice?
Synopsis
The revi'it must be present all at once in one location. Washing from an eighth (half the required amount) twice does not combine to constitute a valid washing.
More in Who Must Wash Hands for Bread
Does water that changed appearance on its own (not due to an external substance) disqualify it for hand-washing?
4 opinions
Does using water for labor (melacha) — such as soaking bread, cooling wine, or washing dirty vessels — disqualify it for hand-washing?
3 opinions
Is water in front of a blacksmith or barber disqualified for hand-washing?
1 opinions
Is water from which animals or birds drank disqualified for hand-washing?
3 opinions
Does melacha (labor) disqualify mikveh water or spring water that is still connected?
3 opinions
May one use fire-heated water (chamei ha-ur) for hand-washing, even when it is scalding hot (yad soledet)?
3 opinions
May one immerse hands in the hot springs of Tiberias (chamei Teveriah), and what are the conditions?
3 opinions across 3 eras
What is the reason geothermal spring water (like Tiberias) is invalid for vessel-based hand-washing, and does the dog-drinkability test apply to other bitter/hot springs?
3 opinions
Related from other topics
If a vessel has a hole but still holds a revi'it below the hole, may one pour from the hole itself?
Drying Hands After Washing
Is a vessel that can only hold a revi'it when propped up (not freestanding) valid for netilat yadayim?
Drying Hands After Washing
When one washes twice (before eating, after relieving oneself), must the second washing (for Netilat Yadayim) be performed with a full revi'it, and how does the rubbing/scrubbing between pours relate to the validity of the washing?
Bread Cooked or Fried
Does eating a small amount of bread or drinking a cup of wine (revi'it) at the Kiddush location satisfy the makom seudah requirement, even if the full meal is then eaten elsewhere?
Seudah Shlishit — Third Meal
What is the combination time for drinking installments on Yom Kippur — revi'it time or achilat pras?
Washing on Yom Kippur
Must the revi'it of water be poured all at once, or may it be added incrementally?
Shema Near Animal Waste
Discussion
Discussion coming soon.
The Daily Law
One question. Every opinion. Every morning.
A new halakhic question and the full spectrum of rabbinic thought, delivered daily.