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
bayhaqi:13916 – Abū ʿAbdullāh al-Ḥāfiẓ > Abū Aḥmad al-Ḥāfiẓ > Muḥammad b. Isḥāq Abū al-ʿAbbās > Qutaybah b. Saʿīd > al-Layth > Yazīd b. Abū Ḥabīb > ʿIrāk b. Mālik > ʿUrwah > Rasūl

[Machine] Allah ﷺ gave a speech to Aisha to Abu Bakr, and Abu Bakr said, "Am I not your brother?" And Aisha replied, "Indeed, you are my brother in the religion of Allah and His book, and she is permissible for me."  

البيهقي:١٣٩١٦ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو أَحْمَدَ الْحَافِظُ أنبأ مُحَمَّدُ بْنُ إِسْحَاقَ أَبُو الْعَبَّاسِ ثنا قُتَيْبَةُ بْنُ سَعِيدٍ ثنا اللَّيْثُ عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ عَنْ عِرَاكِ بْنِ مَالِكٍ أَنَّ عُرْوَةَ أَخْبَرَهُ أَنَّ رَسُولَ

اللهِ ﷺ خَطَبَ عَائِشَةَ إِلَى أَبِي بَكْرٍ ؓ فَقَالَ أَبُو بَكْرٍ أَمَا أَنَا أَخُوكَ؟ فَقَالَ إِنَّكَ أَخِي فِي دِينِ اللهِ وَكِتَابِهِ وَهِيَ لِي حَلَالٌ  

رَوَاهُ الْبُخَارِيُّ فِي الصَّحِيحِ عَنْ عَبْدِ اللهِ بْنِ يُوسُفَ عَنِ اللَّيْثِ هَكَذَا مُرْسَلًا

See similar narrations below:

Collected by Bukhārī
bukhari:5081 – ʿAbdullāh b. Yūsuf > al-Layth > Yazīd > ʿIrāk > ʿUrwah

The Prophet ﷺ asked Abu Bakr for ʿAisha's hand in marriage. Abu Bakr said "But I am your brother." The Prophet ﷺ said, "You are my brother in Allah's religion and His Book, but she (Aisha) is lawful for me to marry."  

البخاري:٥٠٨١ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ حَدَّثَنَا اللَّيْثُ عَنْ يَزِيدَ عَنْ عِرَاكٍ عَنْ عُرْوَةَ

أَنَّ النَّبِيَّ ﷺ خَطَبَ عَائِشَةَ إِلَى أَبِي بَكْرٍ فَقَالَ لَهُ أَبُو بَكْرٍ إِنَّمَا أَنَا أَخُوكَ فَقَالَ أَنْتَ أَخِي فِي دِينِ اللَّهِ وَكِتَابِهِ وَهْىَ لِي حَلاَلٌ