Deuteronomy 21:23
you must not leave the body on the tree overnight, but you must be sure to bury him that day, because anyone who is hung on a tree is under God's curse. You must not defile the land the LORD your God is giving you as an inheritance.

Ezekiel 39:11
And on that day I will give Gog a burial place in Israel, the Valley of the Travelers, east of the Sea. It will block those who travel through, because Gog and all his hordes will be buried there. So it will be called the Valley of Hamon-gog.

Ezekiel 39:14
And men will be employed to continually pass through the land to cleanse it by burying the invaders who remain on the ground. At the end of the seven months they will begin their search.

Ezekiel 39:16
(Even the city will be named Hamonah.) And so they will cleanse the land.'