فِي أَدْنَى الْأَرْضِ وَهُم مِّن بَعْدِ غَلَبِهِمْ سَيَغْلِبُونَ
“Alif, Lam, Meem. The Byzantines have been defeated in the nearby land. But they, after their defeat, will overcome within a few years. To Allah belongs the command before and after. And that day, the believers will rejoice in the victory of Allah. He gives victory to whom He wills, and He is the Exalted in Might, the Merciful.”
The opening verses of Surah al-Rum, prophesying the Roman victory over the Persians, are the subject of Abu Bakr RA's wager with Ubay ibn Khalaf.