Mishkat al-Masabih · Book 29 · Hadith 5954
وَعَن ابْن عمر أَنَّ عُمَرَ بَعَثَ جَيْشًا وَأَمَّرَ عَلَيْهِمْ رَجُلًا يُدْعَى سَارِيَةَ فَبَيْنَمَا عُمَرُ يَخْطُبُ فَجَعَلَ يَصِيحُ: يَا أَمِيرَ الْمُؤْمِنِينَ لَقِيَنَا عَدُوُّنَا فَهَزَمُونَا فَإِذَا بِصَائِحٍ يَصِيحُ: يَا سَارِيَ الْجَبَلَ. فَأَسْنَدْنَا ظُهُورَنَا إِلَى الْجَبَلِ فَهَزَمَهُمُ اللَّهُ تَعَالَى رَوَاهُ الْبَيْهَقِيُّ فِي دَلَائِل النُّب…
Ibn `Umar told that 'Umar sent off an army over which he appointed a man called Sariya as commander. While `Umar was addressing the people he began to shout, `Keep near the mountain, Sari[*]" A messenger came later from…