The Book of Jihad and Expeditions
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ أَخْبَرَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ مَعْمَرٍ، عَنِ الزُّهْرِيِّ، بِهَذَا الإِسْنَادِ .This hadith has been narrated on the authority of Zuhri
From Sahih Muslim, whose reports the scholars accept as authentic.