Jami' at-Tirmidhi
Jami` at-Tirmidhi 276
حَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا أَبُو دَاوُدَ، أَخْبَرَنَا شُعْبَةُ، عَنْ قَتَادَةَ، قَالَ سَمِعْتُ أَنَسًا، يَقُولُ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " اعْتَدِلُوا فِي السُّجُودِ وَلاَ يَبْسُطَنَّ أَحَدُكُمْ ذِرَاعَيْهِ فِي الصَّلاَةِ بَسْطَ الْكَلْبِ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Mahmud ibn Ghaylan narrated to us: Abu Dawud narrated to us: Shu‘bah informed us, from Qatadah, who said: I heard Anas say that the Messenger of Allah said: ‘Maintain a balanced posture in prostration, and let none of you spread his forearms on the ground during prayer as a dog spreads them.’ Abu Isa said: This hadith is hasan sahih.
Notes and open questions — unreviewed
The narration repeats the instruction to keep the forearms lifted from the ground while prostrating.