Numbers 5:15

then he is to take his wife to the priest. He must also take an offering of a tenth of an ephah5:15 That is, probably about 3 1/2 pounds or about 1.6 kilograms of barley flour on her behalf. He must not pour olive oil on it or put incense on it, because it is a grain offering for jealousy, a reminder-offering to draw attention to wrongdoing.

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