Musnad Abu Ya'la al-Mawsili 155:321

Ubayd Allah ibn Mu'adh ibn Mu'adh al-'Anbari narrated to us, my father narrated to us, Shu'bah narrated to us, from Abu Bakr ibn Hafs, from al-Agharr Abu Muslim, from Abu Hurayrah, from the Prophet (may Allah bless him and grant him peace), who said: "Perform ablution from what the fire has cooked."