Leviticus 6:27

Whatsoever shall touch the flesh thereof shall be holy (Cf v. 18); and when there is sprinkled of the blood thereof upon any garment, thou shalt wash that whereon it was sprinkled in the Holy Place. So strict was the Law in this case that the priest had to have the dress of the worshiper washed before he left the court of the Sanctuary, in case any of the blood of the sacrificial animal was spattered on it. The entire animal with its blood belonged to the Lord, and not even a drop of the latter could he carried out of the Sanctuary on the garment of the worshiper.