I heard Messenger of Allah ﷺ as saying: There would lie open for a group of Muslims, or for a group of believers, the treasures of the family of Kisra which would be in the white (palace). In a version of Qutaiba there is definitely the word "Muslim".
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لَتَفْتَحَنَّ عِصَابَةٌ مِنَ الْمُسْلِمِينَ أَوْ مِنَ الْمُؤْمِنِينَ كَنْزَ آلِ كِسْرَى الَّذِي فِي الأَبْيَضِ قَالَ قُتَيْبَةُ مِنَ الْمُسْلِمِينَ وَلَمْ يَشُكَّ