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:3568Abū al-Ḥasan ʿAlī b. Muḥammad b. ʿAlī al-Muqriʾ al-Mihrajānī Bihā > al-Ḥasan b. Muḥammad b. Isḥāq > Yūsuf b. Yaʿqūb al-Qāḍī > Muḥammad b. Abū Bakr > Yaḥyá b. Saʿīd > Saʿīd b. Ziyād > Ziyād b. Ṣubayḥ > Ṣallayt > Janb Ibn ʿUmar

[Machine] Indeed, the Messenger of Allah ﷺ prohibited crucifixion during prayer, narrated by Makki ibn Ibrahim from Sa'eed. And he also forbade hunching over during prayer, and we have narrated from Aisha and Ibn Abbas that they disliked it.  

البيهقي:٣٥٦٨وَأَخْبَرَنَا أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدِ بْنِ عَلِيٍّ الْمُقْرِئُ الْمِهْرَجَانِيُّ بِهَا أنبأ الْحَسَنُ بْنُ مُحَمَّدِ بْنِ إِسْحَاقَ ثنا يُوسُفُ بْنُ يَعْقُوبَ الْقَاضِي ثنا مُحَمَّدُ بْنُ أَبِي بَكْرٍ ثنا يَحْيَى بْنُ سَعِيدٍ عَنْ سَعِيدِ بْنِ زِيَادٍ قَالَ حَدَّثَنِي زِيَادُ بْنُ صُبَيْحٍ قَالَ صَلَّيْتُ إِلَى جَنْبِ ابْنِ عُمَرَ ؓ وَأَنَا لَا أَعْرِفُهُ فَوَضَعْتُ يَدِي عَلَى خَاصِرَتِي فَنَحَّى يَدِي فَلَمَّا قَضَيْتُ الصَّلَاةَ قُلْتُ مَا أَرَدْتَ إِلَيَّ؟ قَالَ أَنْتَ هُوَ أَنْتَ هُوَ؟ قَالَ

إِنَّ رَسُولَ اللهِ ﷺ كَانَ يَنْهَى عَنِ الصَّلْبِ فِي الصَّلَاةِ وَرَوَاهُ مَكِّيُّ بْنُ إِبْرَاهِيمَ عَنْ سَعِيدٍ وَقَالَ عَنِ التَّخَصُّرِ فِي الصَّلَاةِ وَرُوِّينَا عَنْ عَائِشَةَ وَابْنِ عَبَّاسٍ أَنَّهُمَا كَرِهَا ذَلِكَ