Iyas bin Salamah narrates from his father (Sayyiduna Salamah bin Akwa’ رضي الله عنه): When we attacked the tribe of Hawazin at night, which was an attack under the leadership of Sayyiduna Abu Bakr رضي الله عنه, whom the Prophet صلى الله عليه وسلم had appointed as our leader, our battle cry was: "Kill! Kill!" The narrator states: That night, I killed members of seven households with my own hand.
Hadith Referenceصحیح ابن حبان / كتاب السير / 4748
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيحسن - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطعبد الله بن بكار ذكره المؤلف في الثقات وقد توبع ومن فوقه من رجال الصحيح