'Solemn Assembly' in the Bible

Seven days you shall offer an offering made by fire unto the LORD: on the eighth day shall be a holy convocation unto you; and you shall offer an offering made by fire unto the LORD: it is a solemn assembly; and you shall do no regular work on it.

On the eighth day you shall have a solemn assembly: you shall do no regular work on it:

Six days you shall eat unleavened bread: and on the seventh day shall be a solemn assembly to the LORD your God: you shall do no work therein.

And Jehu said, Proclaim a solemn assembly for Baal. And they proclaimed it.

And in the eighth day they made a solemn assembly: for they observed the dedication of the altar seven days, and the feast seven days.

Also day by day, from the first day unto the last day, he read in the book of the law of God. And they kept the feast seven days; and on the eighth day was a solemn assembly, according to the ordinance.

Sanctify you a fast, call a solemn assembly, gather the elders and all the inhabitants of the land into the house of the LORD your God, and cry unto the LORD.

Blow the trumpet in Zion, sanctify a fast, call a solemn assembly: