Ezekiel 43:17; Ezekiel 43:20

17 "The ledge shall be fourteen cubits long by fourteen wide in its four sides, the border around it shall be half a cubit and its base shall be a cubit round about; and its steps shall face the east."

20 'You shall take some of its blood and put it on its four horns and on the four corners of the ledge and on the border round about; thus you shall cleanse it and make atonement for it.