عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ رَأَى رَجُلًا سَاقِطًا يَدَهُ فِي الصَّلَاةِ فَقَالَ: ((لَا تَجْلِسْ هَٰكَذَا، إِنَّمَا هَٰذِهِ جِلْسَةُ الَّذِينَ يُعَذَّبُونَ))
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) saw a man who had let his hand hang down during prayer. The Prophet (peace and blessings be upon him) said to him: Do not sit like this; this is the manner of sitting of those who are being punished.