It was narrated that Anas bin Malik would place his hands over his ears and say:
"May my ears be made deaf, if I did not hear the messenger of Allah saying: 'Perform ablution after (eating) that which has been changed by fire.'" (RU)
English reference (RU): Vol. 1, Book 1, Hadith 487 (RU)
Arabic reference (RU): Book 1, Hadith 525 (RU)