Arabic (Original)
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا بَكْرُ بْنُ مُضَرَ عَنْ جَعْفَرِ بْنِ رَبِيعَةَ عَنِ الْأَعْرَجِ عَنْ عَبْدِ اللَّهِ بْنِ مَالِكِ ابْنِ بُحَيْنَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا صَلَّى فَرَّجَ بَيْنَ يَدَيْهِ حَتَّى يَبْدُوَ بَيَاضُ إِبْطَيْهِ.
English Translation
Qutaybah ibn Sa'id narrated to us: Bakr ibn Mudar narrated to us from Ja'far ibn Rabi'ah from al-A'raj from 'Abdullah ibn Malik ibn Buhaynah, that the Messenger of Allah, peace and blessings be upon him, when he prayed, would spread his arms apart until the whiteness of his armpits showed.