The number three in the Bible represents completeness. That's why Jesus rose on the third day after the Crucifixion -- his transformation was complete. It's why Elijah stretched himself on the dead child three times, why Jonah was in the belly of the fish for three days, why the Lord called Samuel three times, and many more. It's also reflected in the fact that there are three levels of heaven, three levels of hell, three levels to human life and, ultimately, three aspects of the Lord Himself: Father, Son and Holy Spirit.

In Genesis 38:29-30, Phares and Zarah, twin sons of Judah, signify the separation of truth from good and assuming priority, although good is really prior. (Arcana Coelestia 4927-4928) They are also called Perez and Zerah.

(Odkazy: Arcana Coelestia 3325, 4923, Genesis 38:28, 38:30)