We've briefly explained what the ketubah actually is so now let's dig a little deeper into where it originated and what it contains.
Just like the Torah (first five books of Moses), the ketubah contains five parts. The contents of these parts match the Torah/Pentateuch.
Part One ~ Combined Lineage
The first section of the ketubah is a complete and combined family history of the bride and groom. This includes family trees and anecdotes.
Part Two ~ Bride's Personal History
The second section is a detailed account of the bride's personal and family history including a detailed family tree and anecdotes.
Part Three ~ Groom's Personal History
The third section is a detailed account of the groom's personal and family history including a detailed family tree and anecdotes.
Part Four ~ Their Story
The fourth part contains a detailed account of how the bride and groom met with related anecdotes.
Part Five ~ Responsibilities
The final section details the responsibilities that both the groom and the bride must meet before and after the wedding.
Part Two ~ Exodus ~ gives the personal and family history of the bride.
Part Three ~ Leviticus ~ provides the history of God's "family", the Levites.
Part Four ~ Numbers ~ tells of God's love affair with His people in the wilderness and records His joys and sorrows as He reaches out to His bride.
Part Five ~ Deuteronomy ~ specifies the responsibilities that both the bride and groom must fulfill.
"Then I turned, and lifted up mine eyes, and looked, and behold a flying roll (Torah Sefer). And he said unto me, What seest thou? And I answered, I see a flying roll; the length thereof is twenty cubits, and the breadth thereof ten cubits. Then said he unto me, This is the curse that goeth forth over the face of the whole earth: for every one that stealeth shall be cut off as on this side according to it; and every one that sweareth shall be cut off as on that side according to it. I will bring it forth, saith the LORD of hosts, and it shall enter into the house of the thief, and into the house of him that sweareth falsely by my name: and it shall remain in the midst of his house, and shall consume it with the timber thereof and the stones thereof." ~ Zechariah 5:1-4 KJV