It was narrated that Suwaid bin Hanzalah said:"We went out looking for the Messenger of Allah (ﷺ) and Wa'il bin Hujr was with us. An enemy of his seized him and the people were reluctant to swear an oath but I swore that he was my brother, so they set him free. We came to the Messenger of Allah (ﷺ) and I told him that the people had been reluctant to swear an oath, but I had sworn that he was my brother. He said: 'You told the truth. The Muslim is the brother of his fellow Muslim.' "
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ إِسْرَائِيلَ، ح وَحَدَّثَنَا يَحْيَى بْنُ حَكِيمٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ مَهْدِيٍّ، عَنْ إِسْرَائِيلَ، عَنْ إِبْرَاهِيمَ بْنِ عَبْدِ الأَعْلَى، عَنْ جَدَّتِهِ، عَنْ أَبِيهَا، سُوَيْدِ بْنِ حَنْظَلَةَ قَالَ خَرَجْنَا نُرِيدُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ وَمَعَنَا وَائِلُ بْنُ حُجْرٍ فَأَخَذَهُ عَدُوٌّ لَهُ فَتَحَرَّجَ النَّاسُ أَنْ يَحْلِفُوا فَحَلَفْتُ أَنَا أَنَّهُ أَخِي فَخَلَّى سَبِيلَهُ فَأَتَيْنَا رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ فَأَخْبَرْتُهُ أَنَّ الْقَوْمَ تَحَرَّجُوا أَنْ يَحْلِفُوا وَحَلَفْتُ أَنَا أَنَّهُ أَخِي فَقَالَ " صَدَقْتَ الْمُسْلِمُ أَخُو الْمُسْلِمِ " .
IbnMaja
The Chapters on Expiation • Hadith 2119