عَنِ الْمُهْلَبِ بْنِ أَبِي صُفْرَةَ عَنْ رَجُلٍ مِنْ أَصْحَابِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ مَا أَرَاهُمُ اللَّيْلَةَ إِلَّا سَيُبَيِّتُونَكُمْ فَإِنْ فَعَلُوا فَشِعَارُكُمْ حم لَا يُنْصَرُونَ
Al-Muhallab bin Abu Sufrah narrates from a companion of the Messenger (Sayyiduna Bara’ bin Azib) (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: I think that those people (i.e., Abu Sufyan and his people) will attack you at night; if that happens, your slogan will be: {حم لَا یُنْصَرُوْنَ}.