In Ezekiel 39 God describes the kingdom of Gog attacking Israel (verse 2) but then describes how He will turn against Gog and destroy its troops and weapons (verse 4 & 9-10).
Then in verses 11-12 God says this:
11 “It will come to pass in that day that I will give Gog a burial place there in Israel, the valley of those who pass by east of the sea; and it will obstruct travelers, because there they will bury Gog and all his multitude. Therefore they will call it the Valley of Hamon Gog. 12 For seven months the house of Israel will be burying them, in order to cleanse the land.
For 7 months Israel would bury its dead enemies. We are called to bury our dead enemies. In Christ our old man is dead, but unfortunately at times he under goes a resurrection and old ways and habits re-surface. When that happens, we must not let our old man control us, master us, we must bury the dead!