Hadith 2488
Sayyiduna Salamah bin Akwa’ (may Allah be pleased with him) said: I confronted a man and killed him, so the Messenger of Allah (peace and blessings be upon him) gave me his belongings and possessions. And on that day, our code word with Sayyiduna Khalid bin al-Walid (may Allah be pleased with him) was “Umt,” meaning “kill (him).”