Exodus 29:19-21, Leviticus 14:1-7, Numbers 19:14-19, Hebrews 9:11-14; Hebrew 10:19-22 all give examples of the “sprinkling” of blood or water cleansing or purifying an unclean or diseased person, when Isaiah wrote, “he will sprinkle many nations,” he meant that the sprinkling of Jesus’s blood would consecrate, cleanse, and sanctify his believers, just as the animal’s blood or water did in these passages.
Previous to Jesus’s death, believers would sacrifice animals and sprinkle the animals' blood to ceremonially and ritually cleanse an unclean or diseased person. Jesus’s death on the cross served as the human sacrifice for all sinners, and his blood was shed and “sprinkled” to cleanse and wash away the sins of all believers, thus fulfilling Isaiah’s prophecy.
Previous to Jesus’s death, believers would sacrifice animals and sprinkle the animals' blood to ceremonially and ritually cleanse an unclean or diseased person. Jesus’s death on the cross served as the human sacrifice for all sinners, and his blood was shed and “sprinkled” to cleanse and wash away the sins of all believers, thus fulfilling Isaiah’s prophecy.