Leviticus 16:19
And he shall sprinkle of the blood upon it with his finger seven times, and cleanse it, and hallow it from the uncleannesses of the sons of Israel.
Ezekiel 43:18-22
And he said to me, Son of man, thus says lord LORD: These are the ordinances of the altar in the day when they shall make it, to offer burnt-offerings on it, and to sprinkle blood on it.
Zechariah 13:1
In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem, for sin and for uncleanness.
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