Sayyiduna Salamah bin al-Akwa' (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) appointed Sayyiduna Abu Bakr (may Allah be pleased with him) as our commander. We fought some people of the polytheists and killed them, and our battle cry was: "Amit (Kill)!" Sayyiduna Salamah (may Allah be pleased with him) says: That night I killed, with my own hand, the members of nine households.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6213