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 ﷺ ـ وَمَعَنَا وَائِلُ بْنُ حُجْرٍ فَأَخَذَهُ عَدُوٌّ لَهُ فَتَحَرَّجَ النَّاسُ أَنْ يَحْلِفُوا فَحَلَفْتُ أَنَا أَنَّهُ أَخِي فَخَلَّى سَبِيلَهُ فَأَتَيْنَا رَسُولَ اللَّهِ ـ ﷺ ـ فَأَخْبَرْتُهُ أَنَّ الْقَوْمَ تَحَرَّجُوا أَنْ يَحْلِفُوا وَحَلَفْتُ أَنَا أَنَّهُ أَخِي فَقَالَ " صَدَقْتَ الْمُسْلِمُ أَخُو الْمُسْلِمِ " .