Sahih al-Bukhari 6951
Sahih al-Bukhari · Book 89: (Statements made under) Coercion · The oath of a man that his companion is his brother when he fears
Narrated `Abdullah bin `Umar:
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرِ ، حَدَّثَنَا اللَّيْثُ ، عَنْ عُقَيْلٍ ، عَنِ ابْنِ شِهَابٍ ، أَنَّ سَالِمًا ، أَخْبَرَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ ـ رضى الله عنهما ـ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الْمُسْلِمُ أَخُو الْمُسْلِمِ، لاَ يَظْلِمُهُ، وَلاَ يُسْلِمُهُ، وَمَنْ كَانَ فِي حَاجَةِ أَخِيهِ، كَانَ اللَّهُ فِي حَاجَتِهِ " .
Allah's Messenger (ﷺ) said, "A Muslim is a brother of another Muslim. So he should neither oppress him nor hand him over to an oppressor. And whoever fulfilled the needs of his brother, Allah will fulfill his needs."