Removing the arrow from the body
حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ بُرَيْدِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى ـ رضى الله عنه ـ قَالَ رُمِيَ أَبُو عَامِرٍ فِي رُكْبَتِهِ، فَانْتَهَيْتُ إِلَيْهِ قَالَ انْزِعْ هَذَا السَّهْمَ. فَنَزَعْتُهُ، فَنَزَا مِنْهُ الْمَاءُ، فَدَخَلْتُ عَلَى النَّبِيِّ صلى الله عليه وسلم فَأَخْبَرْتُهُ، فَقَالَ " اللَّهُمَّ اغْفِرْ لِعُبَيْدٍ أَبِي عَامِرٍ ".
Narrated Abu Musa: Abu 'Amir was hit with an arrow in his knee, so I went to him and he asked me to remove the arrow. When I removed it, the water started dribbling from it. Then I went to the Prophet (ﷺ) and told him about it. He said, "O Allah! Forgive `Ubaid Abu 'Amir."