BROTHERHOOD H 234 "A Muslim is the brother to another Muslim. He neither wrongs him nor does he hand him over to his enemy. Whosoever occupies himself relieving the need of a brother will find that Allah will occupy Himself relieving his need. Whosoever removes a difficulty from a Muslim will have a difficulty removed by Allah on the Day of Judgement. Whosoever conceals a fault of a Muslim will have his faults concealed by Allah on the Day of Judgement." R 234 Bukhari and Muslim with a chain up to ibn Omar who related that the Prophet, praise and peace be upon him, said this.
233- وعن ابن عمر رضي الله عنهما : أنَّ رَسُول الله صلى الله عليه وآله وسلم ، قَالَ : "المُسْلِمُ أَخُو المُسْلِم ، لا يَظْلِمهُ ، وَلاَ يُسْلمُهُ . مَنْ كَانَ في حَاجَة أخيه ، كَانَ اللهُ في حَاجَته ، وَمَنْ فَرَّجَ عَنْ مُسْلِم كُرْبَةً ، فَرَّجَ اللهُ عَنْهُ بها كُرْبَةً مِنْ كُرَبِ يَومِ القِيَامَةِ ، وَمَنْ سَتَرَ مُسْلِماً سَتَرَهُ اللهُ يَومَ القِيامَةِ" مُتَّفَقٌ عَلَيهِ .