Musnad Ahmad 30:488

'Abd al-Razzaq narrated to us, Ma'mar and Ibn Jurayj informed us, from al-Zuhri, from Abu Salamah ibn 'Abd al-Rahman, from Abu Hurayrah: That a man said, "O Messenger of Allah, may a man pray in a single garment?" The Prophet, peace and blessings of Allah be upon him, said, "Does every one of you have two garments?" It is stated in the hadith of Ibn Jurayj: Ibn Shihab narrated to me, from Abu Salamah, that Abu Hurayrah narrated.