No kinsman — This supposes the person injured to be dead or gone, into some unknown place, and the person injured to be known to the injurer. To the priest — Whom God appointed as his deputy to receive his dues, and take them to his own use, that so he might more chearfully and entirely devote himself to the ministration of holy things. This is an additional explication to that law, Leviticus 6:2, and for the sake thereof it seems here to be repeated.
Related Commentaries of Numbers 5:8
Numbers 5:8
8 But if the man have no kinsman to recompense the trespass unto, let the trespass be recompensed unto the LORD, even to the priest; beside the ram of the atonement, whereby an atonement shall be made for him.