Sahih al-Bukhari 5090
Sahih al-Bukhari · Book 67: Wedlock, Marriage (Nikaah) · Husband and wife should have the same religion
Narrated Abu Huraira:
حَدَّثَنَا مُسَدَّدٌ ، حَدَّثَنَا يَحْيَى ، عَنْ عُبَيْدِ اللَّهِ ، قَالَ حَدَّثَنِي سَعِيدُ بْنُ أَبِي سَعِيدٍ ، عَنْ أَبِيهِ ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " تُنْكَحُ الْمَرْأَةُ لأَرْبَعٍ لِمَالِهَا وَلِحَسَبِهَا وَجَمَالِهَا وَلِدِينِهَا، فَاظْفَرْ بِذَاتِ الدِّينِ تَرِبَتْ يَدَاكَ " .
The Prophet (ﷺ) said, "A woman is married for four things, i.e., her wealth, her family status, her beauty and her religion. So you should marry the religious woman (otherwise) you will be a losers.