OT-PROPHET-MINOR.filter - jps solemn:

jps@Joel:1:14 @ Sanctify ye a fast, call a solemn assembly, gather the elders and all the inhabitants of the land unto the house of the LORD your God, and cry unto the LORD.

jps@Joel:2:15 @ Blow the horn in Zion, sanctify a fast, call a solemn assembly;

jps@Amos:5:21 @ I hate, I despise your feasts, and I will take no delight in your solemn assemblies.