'Solemn Assembly' in the Bible

And he has taken away his tabernacle violently, as a garden. He has destroyed his place of assembly. LORD has caused solemn assembly and Sabbath to be forgotten in Zion. And in the indignation of his anger has despised the king and

LORD has cast off his altar. He has abhorred his sanctuary. He has given up the walls of her palaces into the hand of the enemy. They have made a noise in the house of LORD, as in the day of a solemn assembly.

Thou have called, as in the day of a solemn assembly, my terrors on every side. And there was none who escaped or remained in the day of LORD's anger. My enemy has consumed those whom I have dandled and brought up.