Sahih Muslim Book - 15, Hadith - 3331

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ النَّضْرِ بْنِ أَبِى النَّضْرِ حَدَّثَنِى أَبُو النَّضْرِ حَدَّثَنِى عُبَيْدُ اللَّهِ الأَشْجَعِىُّ عَنْ سُفْيَانَ عَنِ الأَعْمَشِ بِهَذَا الإِسْنَادِ. مِثْلَهُ وَلَمْ يَقُلْ « يَوْمَ الْقِيَامَةِ » وَزَادَ « وَذِمَّةُ الْمُسْلِمِينَ وَاحِدَةٌ يَسْعَى بِهَا أَدْنَاهُمْ فَمَنْ أَخْفَرَ مُسْلِمًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ يَوْمَ الْقِيَامَةِ عَدْلٌ وَلاَ صَرْفٌ ».

A similar report (as no.3330) was narrated from Al-Amash with this chain, but he did not say “the Day of Resurrecting.” And he added: (The Prophet (SAW) said:) “Protection granted by one Muslim is binding upon all of them, and may be given by the humblest of them. Whoever breaks the covenant of Muslim, upon him be the curse of Allah, the Angels and all the people, and on the Day of Resurrection Allah will not accept any ‘Adl nor Sarf from him.”