'Solemn Assembly' in the Bible

For seven days you shall present an offering by fire to the Lord. On the eighth day you shall have a holy convocation and present an offering by fire to the Lord. It is a festive assembly; you shall not do any laborious work [on that day].

‘On the eighth day you shall have a solemn assembly [to mark the end of the feast]; you shall do no laborious work.

For six days you shall eat unleavened bread, and on the seventh day there shall be a celebration to the Lord your God; so you shall do no work [on that day].

Jehu said, “Consecrate a festive assembly (celebration) for Baal.” And they proclaimed it.

On the eighth day they held a celebration, for they had observed the dedication of the altar for seven days, and the feast for seven days.

Every day, from the first day to the last, Ezra read from the Book of the Law of God. They celebrated the feast for seven days; on the eighth day there was a [closing] solemn assembly in accordance with the ordinance.

The roads to Zion are in mourningBecause no one comes to the appointed feasts.All her gates are desolate;Her priests are groaning,Her virgins are grieved and suffering,And she suffers bitterly.

You [Lord] called as in the day of an appointed feastMy terrors (dangers) on every side;And there was no one who escaped or survivedIn the day of the Lord’s anger.Those I have cared for and brought up with tenderness,My enemy annihilated them.

What will you do on the day of the appointed festivalAnd on the day of the feast of the Lord [when you are in exile]?

Consecrate a fast,Proclaim a solemn assembly,Gather the eldersAnd all the inhabitants of the landTo the house of the Lord your God,And cry out to the Lord [in penitent pleadings].

Blow a trumpet in Zion [warning of impending judgment],Dedicate a fast [as a day of restraint and humility], call a solemn assembly.

“I will gather those [Israelites in captivity] who grieve about the appointed feasts—They came from you, [O Zion];On whom the reproach [of exile] is a burden.