Sayyiduna Sinan bin Wabarah (may Allah be pleased with him) narrates: "We were with the Prophet (peace and blessings be upon him) in the expedition of al-Muraysi' (the expedition of Banu al-Mustaliq), and on that occasion their watchword (battle cry/secret password) was: 'Ya Mansur, amit' (O you who are given victory, put (the enemy) to death)."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Sinan bin Wabarah (may Allah be pleased with him) only with this chain; Muhammad bin Jahdam is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 6015
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 6496»