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.
bayhaqi:4694Abū ʿAbdullāh al-Ḥāfiẓ > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > al-ʿAbbās al-Dūrī > Rawḥ b. Ḥarb al-Simsār Abū Ḥātim > Marwān b. Muʿāwiyah > ʿĀṣim al-Aḥwal > Ibn Sīrīn

[Machine] "And I used to recite twenty Surahs in each unit of prayer, but someone informed me that they had heard the Messenger of Allah ﷺ saying that each Surah has its portion from the bowing and prostrating, which was confirmed by Abdullah bin Ziyad on the authority of Aasim in the narration of Abu Al-Aliyah."  

البيهقي:٤٦٩٤أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا الْعَبَّاسُ الدُّورِيُّ ثنا رَوْحُ بْنُ حَرْبٍ السِّمْسَارُ أَبُو حَاتِمٍ ثنا مَرْوَانُ بْنُ مُعَاوِيَةَ أنبأ عَاصِمٌ الْأَحْوَلُ عَنِ ابْنِ سِيرِينَ قَالَ كَانَ ابْنُ عُمَرَ يَقْرَأُ عَشْرَ سُوَرٍ فِي كُلِّ رَكْعَةٍ قَالَ عَاصِمٌ فَذَكَرْتُ ذَلِكَ لِأَبِي الْعَالِيَةِ فَقَالَ

وَأَنَا كُنْتُ أَقْرَأُ عِشْرِينَ سُورَةً فِي كُلِّ رَكْعَةٍ وَلَكِنْ حَدَّثَنِي مَنْ سَمِعَ رَسُولَ اللهِ ﷺ يَقُولُ لِكُلِّ سُورَةٍ حَظُّهَا مِنَ الرُّكُوعِ وَالسُّجُودِ تَابَعَهُ عَبْدُ الْوَاحِدِ بْنُ زِيَادٍ عَنْ عَاصِمٍ فِي حَدِيثِ أَبِي الْعَالِيَةِ