It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (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: "Do not sit like this, this is the way of sitting of those who are being punished."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5972
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف هشام بن سعد.