Charles Ellicott Commentary Numbers 35:15

"For the children of Israel, and for the stranger and for the sojourner among them, shall these six cities be for refuge; that every one that killeth any person unwittingly may flee thither." — Numbers 35:15 (ASV)

For the stranger, and for the sojourner ... — The word ger, “stranger,” properly denotes a foreigner who took up a temporary abode among the Israelites; whereas toshab, “sojourner,” denotes one who was settled in Israel.

Sometimes, however, the words ger and toshab appear to be used as a compound term, as in Leviticus 25:47, where they occur with the conjunctive (or disjunctive) particle in the former part of the verse, and without it in the latter.

“The cities of refuge,” says Dr. Gill, “were of God’s appointing: so Christ, as a Saviour and rock of refuge to His people, is appointed and foreordained of God. They were well known for refuges, as the Lord is in the palaces of Zion. They were open for all at all times, as Christ is for all sinners, even the chief of sinners—Jews or Gentiles.”

“In Christ, they are all one—the Israelites, and the stranger and sojourner. All impediments were removed from their way, and plain directions were given, like those in the Gospel and from its ministers. And there is always room in Christ for those who flee to Him, as there was in those cities.”

“And being in Him, they are safe from the curse and condemnation of the law, from wrath to come, and from the second death. And their redemption and atonement, peace and reconciliation, liberty, life, and salvation are owing to the death of Christ, their High Priest” .