1 Kings 18:19-20

18:19 Now send out messengers and assemble all Israel before me at Mount Carmel, as well as the 450 prophets of Baal and 400 prophets of Asherah whom Jezebel supports.

18:20 Ahab sent messengers to all the Israelites and had the prophets assemble at Mount Carmel.

1 Kings 21:12

21:12 They observed a time of fasting and put Naboth in front of the people.

Joel 1:14

1:14 Announce a holy fast;

proclaim a sacred assembly.

Gather the elders and all the inhabitants of the land

to the temple of the Lord your God,

and cry out to the Lord.