'Assembly' in the Bible

Now Eli was very old, and he heard all that his sons were doing to all Israel and that they [were] having sexual relations with the women who [were] serving [at] the entrance of [the] tent of assembly.

And all this assembly shall know that the LORD saveth not with sword and spear: for the battle is the LORD'S, and he will give you into our hands.

And Saul sendeth messengers to take David, and they see the assembly of the prophets prophesying, and Samuel standing, set over them, and the Spirit of God is on Saul's messengers, and they prophesy -- they also.