Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) narrates concerning the words of Allah Almighty: (Allah Almighty says:) "Then, after the grief (or distress), He sent down upon you security (or tranquillity) in the form of drowsiness." Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) says: On the occasion of the Battle of Uhud, He caused sleep to overcome us.
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Dirar bin Surad, who is da'if (weak).