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.
bayhaqi:2706Abū al-Naḍr al-Faqīh > Abū ʿAbdullāh Muḥammad b. Naṣr And ʾAbū Isḥāq Ibrāhīm b. Ismāʿīl al-ʿAbdī > Isḥāq b. Ibrāhīm > Marwān b. Muʿāwiyah al-Fazārī > ʿUbaydullāh b. ʿAbdullāh b. al-Aṣam > Yazīd b. al-Aṣam

[Machine] "Maimuna, the wife of the Prophet ﷺ, said: The Messenger of Allah ﷺ, when he prostrated, he would spread his hands, meaning he would extend them outward until his armpits could be seen from behind him. And when he sat, he would place his left thigh."  

البيهقي:٢٧٠٦وأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو النَّضْرِ الْفَقِيهُ ثنا أَبُو عَبْدِ اللهِ مُحَمَّدُ بْنُ نَصْرٍ وَأَبُو إِسْحَاقَ إِبْرَاهِيمُ بْنُ إِسْمَاعِيلَ الْعَبْدِيُّ قَالَا ثنا إِسْحَاقُ بْنُ إِبْرَاهِيمَ أنبأ مَرْوَانُ بْنُ مُعَاوِيَةَ الْفَزَارِيُّ ثنا عُبَيْدُ اللهِ بْنُ عَبْدِ اللهِ بْنِ الْأَصَمِّ عَنْ يَزِيدَ بْنِ الْأَصَمِّ

عَنْ مَيْمُونَةَ زَوْجِ النَّبِيِّ ﷺ قَالَتْ كَانَ رَسُولُ اللهِ ﷺ إِذَا سَجَدَ خَوَّى بِيَدَيْهِ يَعْنِي جَنَحَ حَتَّى يَرَوْا وَضَحَ إِبِطَيْهِ مِنْ وَرَائِهِ وَإِذَا قَعَدَ اطْمَأَنَّ عَلَى فَخِذِهِ الْيُسْرَى  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ إِسْحَاقَ بْنِ إِبْرَاهِيمَ وَرَوَاهُ أَيْضًا جَعْفَرُ بْنُ بُرْقَانَ عَنْ يَزِيدَ بْنِ الْأَصَمِّ

See similar narrations below:

Collected by Muslim, Dārimī
muslim:497aIsḥāq b. Ibrāhīm al-Ḥanẓalī > Marwān b. Muʿāwiyah al-Fazārī > ʿUbaydullāh b. ʿAbdullāh b. al-Aṣam > Yazīd b. al-Aṣam

When the Messenger of Allah ﷺ prostrated himself, he spread his arms, i. e. he separated them so much that the whiteness of his armpits became visible from behind and when he sat (for Jalsa) he rested on his left thigh.  

مسلم:٤٩٧aحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ الْحَنْظَلِيُّ أَخْبَرَنَا مَرْوَانُ بْنُ مُعَاوِيَةَ الْفَزَارِيُّ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ الأَصَمِّ عَنْ يَزِيدَ بْنِ الأَصَمِّ

أَنَّهُ أَخْبَرَهُ عَنْ مَيْمُونَةَ زَوْجِ النَّبِيِّ ﷺ قَالَتْ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا سَجَدَ خَوَّى بِيَدَيْهِ يَعْنِي جَنَّحَ حَتَّى يُرَى وَضَحُ إِبْطَيْهِ مِنْ وَرَائِهِ وَإِذَا قَعَدَ اطْمَأَنَّ عَلَى فَخِذِهِ الْيُسْرَى  

darimi:1371Isḥāq b. Ibrāhīm > Marwān > ʿUbaydullāh b. ʿAbdullāh b. al-Aṣam > Yazīd b. al-Aṣam

When the Messenger of Allah ﷺ prostrated himself, he spread his arms, i. e. he separated them so much that the whiteness of his armpits became visible from behind and when he sat (for Jalsa) he rested on his left thigh. (Using translation from Muslim 497a)  

الدارمي:١٣٧١حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ حَدَّثَنَا مَرْوَانُ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ الْأَصَمِّ عَنْ يَزِيدَ بْنِ الْأَصَمِّ

عَنْ مَيْمُونَةَ زَوْجِ النَّبِيِّ ﷺ قَالَتْ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا سَجَدَ خَوَّى بِيَدَيْهِ يَعْنِي جَنَّحَ حَتَّى يُرَى وَضَحُ إِبْطَيْهِ مِنْ وَرَائِهِ وَإِذَا قَعَدَ اطْمَأَنَّ عَلَى فَخِذِهِ الْيُسْرَى