During the prostrations one should keep one's arms away from one's sides and the abdomen should be kept away from the thighs.
باب يُبْدِي ضَبْعَيْهِ وَيُجَافِي فِي السُّجُودِ
1676
Sahih Bukhari
Sahih
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا ابْنُ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم قِيلَ لَهُ فِي الذَّبْحِ وَالْحَلْقِ وَالرَّمْىِ وَالتَّقْدِيمِ وَالتَّأْخِيرِ فَقَالَ لاَ حَرَجَ "
Narrated Ibn `Abbas:
The Prophet (ﷺ) was asked about the slaughtering, shaving (of the head), and the doing of Rami before or after the due times. He said, "There is no harm in that."
Reference: Sahih al-Bukhari 1734 In-book : Book 25, Hadith 212 USC-MSA web (English) : Vol. 2, Book 26, Hadith 790 (deprecated)
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