Al-Muhallab reported God’s Messenger as saying, “If the enemy attacks you at night let your war-cry be Ha’ Mim'. They will not be helped’.”*
*These words may be taken from sura 41 which is one beginning with Ha Mim. The other words are in verse 16 of that sura. Cf. 44: 41.
Tirmidhi and Abu Dawud transmitted it.
وَعَنْ سَلَمَةَ بْنِ الْأَكْوَعِ قَالَ: غَزَوْنَا مَعَ أبي بكر زمن النَّبِي صلى الله عَلَيْهِ وَسلم فبيَّتْناهُم نَقْتُلُهُمْ وَكَانَ شِعَارُنَا تِلْكَ اللَّيْلَةَ: أَمِتْ أَمِتْ. رَوَاهُ أَبُو دَاوُد
Salama b. al-Akwa‘ said: We went on an expedition with Abu Bakr in the time of the Prophet. We attacked the enemy by night and killed them, and our war-cry that night was “Put to death; put to death.”
Abu Dawud transmitt…
Samura b. Jundub reported the Prophet (ﷺ) as saying, “Kill the old men who are polytheists, but spare their sharkh i.e., their children.
Tirmidhi and Abu Dawud transmitted it.