Numbers 5:15

15then the man shall bring his wife to the priest and bring the offering required of her, a tenth of an ephah
An  ephah was about 3/5 bushel or 22 liters
of barley flour. bHe shall pour no oil on it and put no frankincense on it, for it is a grain offering of jealousy, a grain offering of remembrance, cbringing iniquity to remembrance.

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