The Great Banquet concept is patterned around the parable from Luke14:15-24.
Jesus tells of a master who prepared a great banquet and invited many guests, saying "Come, for everything is now ready." After many excuses for not attending, the master became angry and ordered his servants: "Go quickly into the streets and alleys of the town and bring in the poor, the crippled, the blind and the lame."
After this has been done and room still remained, the master told his servants:
"Go out to the roads and country lanes and make them come in, so that my house will be full."
Then, after additional invitations were given, the banquet was presented to his guests. The result of the master's invitation was
to feast and fellowship at
a banquet given by God.