Sayyiduna Sa’d (may Allah be pleased with him) narrates that on the day of the Battle of Uhud, I saw two men on the right and left of the Prophet (peace and blessings be upon him) who were wearing white clothes, and they were fighting very fiercely. I had never seen them before nor after that.
Hadith Referenceمسند احمد / مسند باقي العشرة المبشرين بالجنة / 1468
Hadith Gradingحکم دارالسلام:إسناده صحيح ، خ : 4054، م : 2306