New Revised Standard Version
On the eighth day they held a solemn assembly; for they had observed the dedication of the altar seven days and the festival seven days.

Contemporary English Version
Then on the next day, everyone came together for worship. They had celebrated a total of 14 days, 7 days for the dedication of the altar and 7 more days for the festival.

New American Bible
On the eighth day they held a solemn assembly, for they had celebrated the dedication of the altar for seven days and the feast for seven days.

Douay-Rheims Bible
And he made on the eighth day a solemn assembly, because he had kept the dedication of the altar seven days, and had celebrated the solemnity seven days.

And he made on the eighth day a solemn assembly, because he had kept the dedication of the altar seven days, and had celebrated the solemnity seven days.

solemn assembly [heb] restraint

Leviticus 23:36 The eighth day also shall be most solemn and most holy: and you shall offer holocausts to the Lord. For it is the day of assembly and congregation. You shall do no servile work therein.

Deuteronomy 16:8 Six days shalt thou eat unleavened bread: and on the seventh day, because it is the assembly of the Lord thy God, thou shalt do no work.

Nehemiah 8:18 And he read in the book of the law of God day by day, from the first day till the last, and they kept the solemnity seven days, and in the eighth day a solemn assembly according to the manner.

Joel 1:14 Sanctify ye a fast, call an assembly, gather together the ancients, all the inhabitants of the land into the house of your God: and cry ye to the Lord:

seven days

2 Chronicles 30:23 And it pleased the whole multitude to keep other seven days: which they did with great joy.

1 Kings 8:65 And Solomon made at the same time a solemn feast, and all Israel with him, a great multitude, from the entrance of Emath to the river of Egypt, before the Lord our God, seven days and seven days, that is, fourteen days.