the bath: the standard large measure for liquids, chiefly wine and oil, matching in size the ephah used for grain
The bath is the working unit of ancient Israel's liquid measures, the one a scribe reaches for when wine or olive oil is being counted out in quantity. The system ran two matching scales, one for what pours and one for what is scooped, and the bath was paired with the grain measure of identical size, the ephah (אֵיפָה). Both were a tenth of the largest bulk unit, the homer (חֹמֶר), which also went by the name kor (כֹּר). Below the bath came the smaller measures of the sanctuary, the hin (הִין) at a sixth of a bath and the log (לֹג) smaller still.
The word turns up in a narrow set of places, and each one puts it to a different use:
- royal supply lists, where wine and oil are issued by the thousand
- the building account of Solomon's temple, where the great bronze basin and the ten smaller ones are rated by how much they hold
- Ezekiel's plan for a restored nation, where the bath is legislated as a public standard that has to be honest
Nobody can pin its exact size. Storage jars recovered at Lachish and elsewhere carry the word scratched into the clay, and the capacity reconstructed from those fragments comes to roughly six gallons, about twenty-two liters. An older figure, worked out from the way Josephus converted the bath into Greek liquid units, ran nearly twice that. So a Bible that prints a number in gallons or liters is passing on a scholarly estimate, not something the Hebrew itself states.
Because the bath governed how much oil or wine actually changed hands, it carried moral weight. A trader who quietly shrank his bath cheated every customer, which is why Ezekiel lists an honest bath beside honest scales among the things a renewed people owes God. Isaiah turns the same unit into a picture of ruin: ten acres of vineyard yielding a single bath is a harvest that has all but failed.