Didn't He Sayغُلِبَتِ الرُّومُ فِي أَدْنَى الْأَرْضِ وَهُم مِّن بَعْدِ غَلَبِهِمْ سَيَغْلِبُونَ فِي بِضْعِ سِنِينَ
"The Byzantines have been defeated in the nearest land. But they, after their defeat, will overcome within three to nine years."
Qur'an 30:2–4 · trans. Saheeh International
Sasanian armies took Jerusalem in 614 and Egypt by 619 — the low point the verse names. Heraclius' counter-campaign broke Persia at Nineveh in 627 and the war ended with the Persian collapse of 628, inside the biḍʿ window (three to nine years) the text staked in advance. The stamp covers the reversal within the window; the revelation date itself rests on the sīrah chronology, and that dependency is noted on file.
[9] Kaegi, Heraclius, Emperor of Byzantium · Chronicon Paschale s.a. 614–628 · al-Ṭabarī, Tārīkh al-rusul wa-l-mulūk