'The first resurrection,' mentioned in Revelation 20:5, 6, does not mean a first resurrection, but the essence and primary part of resurrection, which is salvation and eternal life. There is only one resurrection to life. A second does not happen, and is not mentioned anywhere in the Bible.

(References: Apocalypse Explained 6; Apocalypse Revealed 851; Revelation 20:5-6)

3866. From the internal sense of the words that Leah uttered concerning Reuben when he was born, namely 'Jehovah has seen my affliction, for now my husband will love me', one may recognize which attribute of the Church is meant by Reuben or the tribe named after Reuben, namely that which is the first stage of regeneration, or that which comes first when a person becomes the Church; and that that which comes first is the truth of doctrine by means of which he is able to arrive at the good of life.