Zuhri said: "I had dinner with Walid or Abdul-Malik. When the time for prayer came, I got up to perform ablution. Ja'far bin 'Amr bin Umayyah said: 'I bear witness that my father bore witness, that the Messenger of Allah ate food that had been changed by fire, then he performed prayer, and he did not perform ablution.' (Sahih) And 'Ali bin 'Abdullah bin 'Abbas said: 'And I bear witness to similar from my father.'"