The Bible seems to be more implicit than explicit on this.

"I tell you, many will come from east and west and recline at table with Abraham, Isaac, and Jacob in the kingdom of heaven" Matthew 8:11

This is the Father and his two sons being together so they recognize each other.


"The true soldier fights not because he hates what is in front of him, but because he loves what is behind him."
-G. K. Chesterton