15 And Moses proceeded to slaughter+ it and take the blood+ and put it with his finger upon the horns of the altar round about and purify the altar from sin, but the rest of the blood he poured at the base of the altar, that he might sanctify it to make atonement+ upon it.

19 He must also spatter+ some of the blood upon it with his finger seven times and cleanse it and sanctify it from the uncleannesses of the sons of Israel.