Albert Barnes Commentary Ezekiel 39:14

"And they shall set apart men of continual employment, that shall pass through the land, and, with them that pass through, those that bury them that remain upon the face of the land, to cleanse it: after the end of seven months shall they search." — Ezekiel 39:14 (ASV)

Men of continual employment - literally, as margin, that is, men regularly appointed to this business. As the land of Israel figuratively represents the Church of Christ, the purification of that land is a proper part of the figure to indicate such a sanctification and cleansing of His Church, as Paul describes (Ephesians 5:26–27).