WE RELATE FROM Ibn as-Sunnī from Anas 
, who related: “We were with the Prophet 
on a military campaign, when he encountered the enemy and I heard him say: ‘O Master of the Day of Judgment, You alone do I worship and You alone do I ask for help.’ I saw men fall to the ground with the angels beating them from the front and the back.” It is mustaḥabb to say what has been narrated in the previous chapter in the hadith related by Abū Mūsā al-Ash‘arī . [1].
, who related: “We were with the Prophet on a military campaign, when he encountered the enemy and I heard him say: ‘O Master of the Day of Judgment, You alone do I worship and You alone do I ask for help.’ I saw men fall to the ground with the angels beating them from the front and the back.” It is mustaḥabb to say what has been narrated in the previous chapter in the hadith related by Abū Mūsā al-Ash‘arī . [1].
Yā Mālika Yawmi-d-Dīn, iyyāka a‘budu wa iyyāka asta‘īn.
References
[1] Ibn as-Sunnī (336) and al-Futūḥāt (4/19). Ibn Ḥajar describes this hadith as gharīb.