Exodus 29:37
TSK
Seven days you shall make atonement for the altar, and sanctify it: and the altar shall be most holy; whatever touches the altar shall be holy.
TSK
Treasury of Scripture Knowledge references in WEB.
Seven days you shall make atonement for the altar, and sanctify it: and the altar shall be most holy; whatever touches the altar shall be holy.
Six days you shall eat unleavened bread; and on the seventh day shall be a solemn assembly to Yahweh your God; you shall do no work [therein].
So Solomon held the feast at that time, and all Israel with him, a great assembly, from the entrance of Hamath to the brook of Egypt, before Yahweh our God, seven days and seven days, even fourteen days.
Also day by day, from the first day to the last day, he read in the book of the law of God. They kept the feast seven days; and on the eighth day was a solemn assembly, according to the ordinance.