A piece of steel found in the ruins of New York's Twin Towers carries words of warning from God Himself, according to Jonathan Cahn, the author of "The Harbinger" and the subject of a new documentary film called "The Harbinger Man."

Fused in the chunk of steel now on display in the National September 11 Memorial Museum in New York City are two twisted pages from the Bible, showing a large portion of Matthew Chapter 5 and a tiny portion of Matthew 7, a WND report said.

The unusual object was found in March 2002 more than five months after suicidal Islamic terrorists launched multiple attacks on the United States, including the World Trade Center buildings in New York City which they brought down by smashing two hijacked civilian airliners into the structures. It was the worst terrorist attack on the US mainland, killing nearly 3,000 people.

The chunk of steel with fused biblical passages was shown to Pope Francis during his recent visit to the US, as reported by the New York Times.

The larger portion of the exposed text, from Matthew Chapter 5, shows a message of forgiveness—how Jesus admonished his followers not to exact "an eye for an eye" vengeance for the wrongs done to them but rather to turn the other cheek.

Cahn said he had seen the fused scripture years ago but didn't notice then the tiny portion of Matthew Chapter 7, Verse 27, that shows up in red type.

Matthew 7 contains the last part of Jesus' Sermon on the Mount, where the Lord talked about two types of houses built on different types of foundations – one on rock, the other on sand.

Cahn said, "the last words of the Sermon, the last to appear in red on the fused page, describe a great fall, the collapse of a building."

"The building falls as the result of a storm. It cannot withstand the forces that come against it because it's not grounded on the rock. The rock represents the Word of God," he said.

The full context of Matthew 7, according to WND, is this: "Now everyone who hears these sayings of Mine, and does not do them, will be like a foolish man who built his house on the sand: And the rain descended, the floods came, and the winds blew and beat on that house; and it fell. And great was its fall."

Cahn believes the Twin Towers that fell at Ground Zero represented America.

"An America that stands on the foundation of God's Word will withstand that which comes against it, and will not fall," Cahn said. "But an America removed from the Word of God, an America that no longer stands on the foundation on which it was built, will not withstand the forces that come against it, but will collapse, and great will be its fall."

Cahn noted that even though American civilisation was founded and established on the Word of God when the Puritans arrived to colonise the country, "America has moved away from its biblical foundations."

As a result, he said, the country has become "a house without a foundation, a building resting on shifting sand."

"On Sept. 11, the building that embodied the soaring heights that American civilisation have attained, collapsed, and came crashing down to the ruins of Ground Zero," he said. "The fact that within those same rules was embedded in the words of a sign that warns of collapse and a great fall of the house that rests not on the foundation of the rock, on the word of God, sounds a warning we can only ignore at our peril."