Musnad Abu Ya'la al-Mawsili 248:38

Abu Talib Abd al-Jabbar ibn Asim narrated to us, he said: Ubayd Allah ibn Amr al-Ruqqi Abu Wahb narrated to me, from Abd al-Malik ibn Umayr, from Jabir ibn Samurah, that a man asked the Messenger of Allah, may Allah bless him and grant him peace: "Should I pray in the garment in which I come to my wife?" He said: "Yes, unless you see something on it, then wash it."