A crucial stage of the war fought between the Byzantine (Romans) Empire and the Persians, when the Byzantines were defeated and lost Jerusalem around 613 AD, had taken place at the Dead Sea basin , which is situated at the intersection point of the lands belonging to Syria, Palestine, and Jordan. The "Dead Sea", lying 395 meters below sea level, is the lowest region on Earth. The altitude of the Dead Sea could only be measured with modern measurement techniques. Before that, it was impossible for anyone to know that it was the lowest region on the surface of the Earth.
Now note this verse of Koran:
"Elif, Lam, Mim. The Romans have been defeated in the lowest land, but after their defeat they will themselves be victorious in a few years' time. The affair is God's from beginning to end." [ 30:1-4]Also at the end, "the victory of the Romans," proclaimed by God in this verse, miraculously came true. Around seven years after the revelation of this verse, in December 627 AD, a decisive battle between Byzantium and the Persian Empire was fought at Nineveh. And this time the Byzantine army unexpectedly defeated the Persians.