The Word of God

"Cut off the head, and the body will flounder. Waste not thy time nor thy breath on the Leviathan herd. Point thy blade at the heart of their master, for from him springs all their messages. Leviathan cannot be slain but by the bone of a righteous mortal, washed in the blood of three fallen: a fallen angel, the ruler of fallen humanity, and the father of the fallen beasts."

- - The Word of God.

The Word of God was written and depicted by Metatron, an Archangel who ciphered it while God was forming creation. The Word was carved into an unknown number of stone tablets which were later locked in an underground vault in the core of the Earth (possibly multiple vaults).

It is breakable, however, the prophet destined to read it can re-connect it, if it were to break. It is written either in an ancient language or one not taught to angels, and only the prophet linked to it can read it.

In 2012, Dick Roman excavated one of these tablets, which contained the secrets on how to kill the Leviathan. Crowley later got his hands on one somehow that contained information on demons.

Documentation
It was written while God was in the process of creating life. It was eventually placed in the Earth's core, "the Vault of the Earth".

Known Tablets

 * Leviathan
 * Demons
 * Angels

The Girl With The Dungeons and Dragons Tattoo
Top Leviathan, Dick Roman, sent another Leviathan to retrieve it at a airport, but Sam intercepted it. They don't know what it is or does.

Reading Is Fundamental
Having it, Dean breaks the shell that contains the script, which causes loud supernatural simultaneous lighting. They take it to Castiel who informs them that it is the Word, but is unable to translate it for them. He then drops and breaks it into three pieces upon teleporting away.

Kevin, a boy reluctantly turned into a prophet, tries to steal it, but Sam and Meg catch him. Upon touching the fragments, the tablet repairs itself. Kevin is able to translate the Word for the Winchesters, giving them at long last the information they need to kill the Leviathan.

There Will Be Blood
The tablet once again falls into the hands of Dick Roman who forces Kevin to translate it for him, by threatening to kill his mother.

We Need To Talk About Kevin
Crowley has gotten his hands on a second Word of God tablet, this one about demons and kidnaps Kevin to read it for him. Kevin learns from it that there is a way to open all of Hell's gates and directs Crowley to a gate in Wisconsin while he performs a spell to open it. However, Kevin tricks Crowley and actually performs a spell from another section of the tablet, a spell that destroy demons. Kevin flees with the tablet after killing his demon captors and hides the tablet, but first learns from it how to defend himself from demons including the effects of holy water and how to make a Devil's Trap. He also learns that there is a way to seal all the gates of Hell forever and banish all demons and informs Sam and Dean of this once they track him down.

What's Up, Tiger Mommy?
Kevin leads Sam and Dean to a bus station where he has hidden the tablet on demons in a locker. However, a corrupt security guard has stolen it and sold it to a pawn shop. Sam, Dean, Kevin and Linda Tran track the tablet to an auction run by the god of greed Plutus where the tablet is up for sale. Crowley and the angel Samandriel are among the bidders, but when the price doesn't get high enough, Plutus has Kevin added to the sale. Finally, after Mrs. Tran agrees to trade her soul, Plutus agrees to give the tablet to her. However, Crowley teams up with Plutus' assistant Beau and possesses Mrs. Tran to steal the tablet. In the confrontation that follows, Crowley escapes with the tablet.

A Little Slice of Kevin
In a desperate attempt to get the tablet translated, Crowley has all of the future prophets kidnapped, but none of them can read it until Kevin dies and they get chosen. With the help of a witch named Delta Mendota, Crowley finds and kidnaps Kevin and tortures him into reading the titles of the tablet's sections to him. Among the sections is a "personal note" from the angel Metatron who wrote the tablet in which he apologizes for taking his leave of God and Heaven and reveals that there is a compendium of tablets, something that interests Crowley greatly as he didn't know there was anymore besides the Leviathan and Demon tablets. Sam, Dean and Castiel attack the warehouse where Crowley is holding the prophets and the tablet, killing a few demons using the "demon bomb" spell from the tablet. Castiel confronts Crowley over the tablet and Kevin and as Crowley tries to flee with it, Castiel breaks the tablet in half. While the Winchesters get one half of the tablet, Crowley escapes with the other half and Sam and Dean, joined by Castiel become determined to find it.

Torn and Frayed
While Samandriel was under torture from Crowley, the angel inadverdently mentioned, in enochian, the presence of a tablet pertaining to angels.

Trivia

 * The Word of God which gives the methods of killing Leviathans was found in Iran.
 * It appears the Word of God can be restored to its original state by the Prophet linked to it. As when Kevin Tran fixed the broken Word of God, when he brought the pieces together.
 * The Word of God also has numerous effects. As when Dean removed the tablet from the clay, every pregnant woman in 100 miles went into labor, causing storms, all of which alerted the remaining Angels that it was found, and Castiel also awoke from his coma due to a signal being sent out that alerted angels that it had been released. (However, these effects seemed to only have happened after the tablet was freed from what Castiel called "The Vault of the Earth").