Ezekiel 39:12

39:12 For seven months Israel will bury them, in order to cleanse the land.

Ezekiel 39:16

39:16 (A city by the name of Hamonah will also be there.) They will cleanse the land.’

Ezekiel 43:26

43:26 For seven days they will make atonement for the altar and cleanse it, so they will consecrate it.