Apocalypse Explained # 432
432. Verse 5. Of the tribe of Judah twelve thousand sealed; of the tribe of Reuben twelve thousand sealed; of the tribe of Gad twelve thousand sealed.
5. "Of the tribe of Judah twelve thousand sealed," signifies love to the Lord, and that all who are in that love are in heaven, and come into heaven n. 433; "of the tribe of Reuben twelve thousand sealed," signifies the light of truth from that good, and that all who are in that light are in heaven and come into heaven n. 434; "of the tribe of Gad twelve thousand sealed," signifies the consequent good of life (n. 435, 436).
Arcana Coelestia # 5582
5582. 'Turn back, buy a little food for us' means that, so as to have life, they should acquire the good of spiritual truth. This is clear from the meaning of 'buying' as acquiring and making one's own, dealt with in 4397, 5374, 5397, 5406, 5410, 5426; and from the meaning of 'food' as the good of truth, dealt with in 5340, 5342. Here the good of spiritual truth is meant, because this kind of good is the subject in what follows. That the purpose was for them to have life follows from this.