﴿ كَتَبَ ٱللَّهُ لَأَغْلِبَنَّ أَنَا۠ وَرُسُلِىٓ ۚ إِنَّ ٱللَّهَ قَوِىٌّ عَزِيزٌۭ ﴾

“[For] God has thus ordained: “I shall most certainly prevail, I and My apostles!” Verily, God is powerful, almighty!”

(Allah hath decreed: Lo! I verily shall conquer, I and My messengers) i.e. Muhammad (pbuh) they shall conquer Persia, Byzantium, the hypocrites and the Jews. (Lo! Allah is Strong) through giving help to his prophets, (Almighty) in retribution against His enemies. This was revealed about 'Abdullah Ibn Ubayy Ibn Salul who said to the true believers: �Do you really think that you shall conquer Persia and Byzantium?�.