Sahih Muslim Book - 52, Hadith - 7331

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ وَأَبُو كَامِلٍ الْجَحْدَرِىُّ قَالاَ حَدَّثَنَا أَبُو عَوَانَةَ عَنْ سِمَاكِ بْنِ حَرْبٍ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ سَمِعْتُ رَسُولَ اللَّهِ -صلى الله عليه وسلم- يَقُولُ « لَتَفْتَحَنَّ عِصَابَةٌ مِنَ الْمُسْلِمِينَ أَوْ مِنَ الْمُؤْمِنِينَ كَنْزَ آلِ كِسْرَى الَّذِى فِى الأَبْيَضِ ». قَالَ قُتَيْبَةُ مِنَ الْمُسْلِمِينَ، وَلَمْ يَشُكَّ.

It was narrated that Jabir bin Samurah said: "I heard the Messenger of Allah (s.a.w) say: 'A group of Muslims, or, of believers, will lay open the treasure of Chosroes which is in the white palace."' Qutaibah said: "... of Muslims," and he was not uncertain.