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.
ahmad:25824Ismāʿīl > Khālid al-Ḥadhhāʾ > Muḥammad b. Sīrīn

[Machine] Aisha used to pray with the Messenger of Allah, ﷺ , two rak'ahs (units of prayer) before the Fajr prayer as much as he would recite the opening chapter of the Quran.  

أحمد:٢٥٨٢٤حَدَّثَنَا إِسْمَاعِيلُ قَالَ أَخْبَرَنَا خَالِدٌ الْحَذَّاءُ عَنْ مُحَمَّدِ بْنِ سِيرِينَ قَالَ قَالَتْ

عَائِشَةُ كَانَ قِيَامُ رَسُولِ اللهِ ﷺ فِي الرَّكْعَتَيْنِ قَبْلَ صَلَاةِ الْفَجْرِ قَدْرَ مَا يَقْرَأُ فَاتِحَةَ الْكِتَابَ