Siyar ibn Ruh

Sayyar ibn Ru'bah or Ru'bah ibn Sayyar, as the hadith is reported with doubt, from the hadith of the Shamis, narrated by Qaylah, from Muslim ibn Ziyad, said: I saw four companions of the Messenger of Allah: Anas ibn Malik, Fadalah ibn Ubayd, Abu al-Munib, and Ru'bah ibn Sayyar, or Sayyar ibn Ru'bah, removing their headgear from behind them, and their garments down to their ankles.

Authored by the three.