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:5972Muḥammad b. ʿAbdullāh b. al-Zubayr > Hishām / Ibn Saʿd > Nāfiʿ > Ibn ʿUmar

[Machine] The Messenger of Allahﷺ saw a man's hand falling during prayer and said, "Do not sit like this, for this is the sitting posture of those who are being punished."  

أحمد:٥٩٧٢حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللهِ بْنِ الزُّبَيْرِ حَدَّثَنَا هِشَامٌ يَعْنِي ابْنَ سَعْدٍ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللهِ ﷺ رَأَى رَجُلًا سَاقِطًا يَدَهُ فِي الصَّلَاةِ فَقَالَ لَا تَجْلِسْ هَكَذَا إِنَّمَا هَذِهِ جِلْسَةُ الَّذِينَ يُعَذَّبُونَ