Leviticus 16:19
And he shall spatter {some of} the blood on it seven times with his finger, and he shall cleanse it and consecrate it from the {Israelites}' impurities.
Ezekiel 43:18-22
And he said to me, "Son of man, thus says the Lord Yahweh: 'These [are] the statutes of the altar on the day {when it is made}, to sacrifice a burnt offering on it and to sprinkle blood on it.
Zechariah 13:1
" 'On that day a well will be opened for the house of David and for the inhabitants of Jerusalem, {to cleanse them from sin and from impurity}.
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