This is the third time that I am coming to you. On the testimony of two or three witnesses every matter shall be confirmed.2 Corinthians 13:1 NASB

Common knowledge is[1][2]:

• Anything you can find in 5 scholarly sources
• Anything you can safely assume the reader/listener already knows
• Not disputed

Bible verses about 2 or 3 witnesses:

• Deuteronomy 17:6
• Deuteronomy 19:15
• Matthew 18:16
• 2 Corinthians 13:1
• 1 Timothy 5:19
• Hebrews 10:28

Biblical examples of God repeating something 2 or 3 times:

• Joseph interpreting dreams (Genesis 40)
• Pharaoh has 2 dreams about the famine (Genesis 41)
• 1 & 2 Chronicles contains much of the same information as 1 & 2 Kings
• Daniel and Revelation have much cross over
• The Gospels

What if this pattern exists across cultures?

And I have other sheep that are not of this fold; I must bring them also, and they will listen to My voice; and they will become one flock, with one shepherd.John 10:16 NASB

The season we're talking about "Common Knowledge"

References

1. "What is Common Knowledge?". Academic Integrity at MIT; visited January 2021
2. Shona McCombes. "Common knowledge: to cite or not to cite?". Scribbr. August 26, 2019