And I say unto you, That many shall come from the east and west, and shall sit down with Abraham, and Isaac, and Jacob, in the kingdom of heaven. Matthew 8:11
And he saith to me, Write, Blessed are they which are called unto the marriage supper of the Lamb. Revelation 19:9
What do you mean two feasts? Well, "east and west" are earthly terms. This feast will be for the blessed of the earth, after the tribulation is over. People will really need a feast by then. Since Abraham, Isaac, and Jacob are there, it is after the resurrection of Daniel 12:2. One minute you are sleeping in the dust, then you go to a wonderful feast!
The second feast is for Christians in heaven. It's just the same for Christians asleep in Christ, only in this feast we will eat with Peter, Paul, and John.
Two feasts at two different times, both joyous events for guests that will never again die.