Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:30:2 –

The Byzantines have been defeated  

The Byzantines — who are among the People of the Scripture — have been vanquished; the Persians vanquished them, and they are not people of a scripture, but worship graven images. The Meccan disbelievers rejoiced in this ˹defeat of the Byzantines˺ and said to the Muslims, ‘We shall vanquish you as the Persians vanquished the Byzantines’;
القرآن:٣٠:٢ –

غُلِبَتِ الرُّومُ  

{غُلبت الروم} وهم أهل الكتاب غلبتها فارس وليسوا أهل كتاب بل يعبدون الأوثان ففرح كفار مكة بذلك، وقالوا للمسلمين: نحن نغلبكم كما غلبت فارس الروم.