When the Prophet ﷺ prostrated himself, he kept his arms so far away from his sides that if a lamb had wanted to pass under his arms, it could have done so.  

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا سَجَدَ جَافَى بَيْنَ يَدَيْهِ حَتَّى لَوْ أَنَّ بَهْمَةً أَرَادَتْ أَنْ تَمُرَّ تَحْتَ يَدَيْهِ مَرَّتْ  

It was narrated from Maimunah that when the Prophet ﷺ prostrated, he would hold his forearms away from his sides, such that if a lamb wanted to pass under his arms, it would be able to do so.  

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا سَجَدَ جَافَى يَدَيْهِ فَلَوْ أَنَّ بَهْمَةً أَرَادَتْ أَنْ تَمُرَّ بَيْنَ يَدَيْهِ لَمَرَّتْ  

[Machine] The Prophet ﷺ used to say: "When I prostrate, if a camel wanted to pass beneath me, it would have been able to pass without touching me."  

كَانَ النَّبِيُّ ﷺ «إِذَا سَجَدَ لَوْ أَرَادَتْ بَهِيمَةٌ أَنْ تَمُرَّ مِنْ تَحْتِهِ لَمَرَّتْ مِمَّا يُجَافِي»  

[Machine] The Messenger of Allah ﷺ used to prostrate so long that if a goat wanted to pass underneath his hands, it could.  

كَانَ رَسُولُ اللهِ ﷺ «إِذَا سَجَدَ جَافَى حَتَّى لَوْ أَنَّ بَهِيمَةً أَرَادَتْ أَنْ تَمُرَّ تَحْتَ يَدَيْهِ مَرَّتْ»  

When the Prophet ﷺ prostrated himself, he kept his arms so far away from his sides that if a lamb had wanted to pass under his arms, it could have done so. (Using translation from Abū Dāʾūd 898)  

أَنَّ النَّبِيَّ ﷺ كَانَ «إِذَا سَجَدَ جَافَى يَدَيْهِ حَتَّى لَوْ أَنَّ بَهْمَةً أَرَادَتْ أَنْ تَمُرَّ تَحْتَ يَدَيْهِ لَمَرَّتْ»  

"كَانَ رَسُولُ اللهِ ﷺ إِذَا سَجَدَ تَجَافَى حَتَّى لَوْ أَنَّ بَهِيمَةً أَرَادَتْ أَنْ تَمُرَّ تَحْتَ يَدِهِ مَرَّتْ".