If some Jewish groups in the early first century identified a messianic figure with the high priest as his template then then one must almost inevitably consider the possibility that they accepted that such a messianic figure would die. And that death would have a saving power if precedent be any guide:
and the congregation shall deliver the manslayer out of the hand of the avenger of blood, and the congregation shall restore him to his city of refuge, whither he was fled: and he shall dwell therein until the death of the high priest, who was anointed with the holy oil.
In the first dramatic miracle performed by Jesus, the expelling of the demon from a man in a Capernaum synagogue, Jesus is addressed as “the holy one of God”.
21 They went to Capernaum, and when the Sabbath came, Jesus went into the synagogue and began to teach. 22 The people were amazed at his teaching, because he taught them as one who had authority, not as the teachers of the law. 23 Just then a man in their synagogue who was possessed by an impure spirit cried out, 24 “What do you want with us, Jesus of Nazareth? Have you come to destroy us? I know who you are—the Holy One of God (ὁ ἅγιος τοῦ θεοῦ)!”
Who or what is “the holy one of God”? It’s not a title of a king. Nor of a prophet, although in 2 Kgs 49 and Judg 16.7 we read of Elisha and Samson respectively being called “a holy one”. Crispin Fletcher-Louis:
God is Israel’s Holy One. And angels are often called holy ones. But the only precedent for a singular ‘the Holy One of God’ is Aaron (Ps. 106.16; Num. 16.7 ‘the holy one (of the LORD’), who dramatically wins the right to the title in the battle with Korah and his rebellious company in Numbers 16. (p. 63)
It might prove interesting to study this exorcism in Mark in comparison with the Korah-Aaron contest. That’s an aside, however.
Three Forms of Impurity; Three Healings
Numbers 5 lists together three forms of impurity that require anyone becoming defiled to be removed from the Israelite camp:
The Lord said to Moses, 2 “Command the Israelites to send away from the camp anyone who has a defiling skin disease or a discharge of any kind, or who is ceremonially unclean because of a dead body. 3 Send away male and female alike; send them outside the camp so they will not defile their camp, where I dwell among them.” 4 The Israelites did so; they sent them outside the camp. They did just as the Lord had instructed Moses.