A Hebrew Bible referred to as "the earliest most complete Hebrew Bible" could become "the most valuable historical document ever sold at auction," according to auctioneer Sotheby's.

This particular copy is called Codex Sassoon. It is expected to sell for $30-50 million, per the Associated Press.

A first-edition copy of the U.S. Constitution that sold for $43.2 million in 2021 is the current record for the most-expensive historical document ever sold.

"Codex Sassoon, created circa 900, is the earliest surviving example of a single codex containing all the books of the Hebrew Bible with their punctuation, vowels, and accents," Sotheby's website states.

The current owner of the codex confirmed via carbon dating that Codex Sassoon is older than the Aleppo Codex, Leningrad Codex, and "two other major early Hebrew Bibles," Christian Post reports.

"Scholars have researched [Codex Sassoon] and it's very, very close -- almost exactly what we have today," Sotheby's Senior Consultant Sharon Liberman Mintz said.

"In fact, it's written in the same square Hebrew script the Torah scrolls are written in and that's been used for hundreds of years. If you can read Hebrew script, you can actually read this Bible very easily."

Codex Sassoon is named after one of its previous modern owners, David Solomon Sassoon (1880-1942).

"[Sassoon] assembled the largest and most important private collection of Hebrew manuscripts in the world and had a special affinity for Bibles in particular," Sotheby's website states.

"Some of the most valuable and important items in his library belonged to this genre of Hebrew literature. His collection catalogue, Ohel Dawid, begins and ends with biblical material, and Codex Sassoon is its very last entry, giving pride of place to this monument of world civilization."

Codex Sassoon will go up for auction by Sotheby's on May 16 in New York. Before the auction, it will tour several cities, including Tel Aviv, Dallas, and Los Angeles for public viewing.