The Prophet said: "Perform ablution after (eating) that which has been changed by fir." Ibn 'Abbas said: "Should I do ablution after (touching) hot water?" Abu Hurairah said: "O son of my brother, when I narrate a Hadith of the Messenger of Allah to you, then do not try to make examples for it."  

أَنَّ النَّبِيَّ ﷺ قَالَ تَوَضَّئُوا مِمَّا غَيَّرَتِ النَّارُ فَقَالَ ابْنُ عَبَّاسٍ أَتَوَضَّأُ مِنَ الْحَمِيمِ فَقَالَ لَهُ يَا ابْنَ أَخِي إِذَا سَمِعْتَ عَنْ رَسُولِ اللَّهِ ﷺ حَدِيثًا فَلاَ تَضْرِبْ لَهُ الأَمْثَالَ  

"The Messenger of Allah said: 'Perform ablution after (eating) that which has been changed by fire.'"  

قَالَ رَسُولُ اللَّهِ ﷺ تَوَضَّئُوا مِمَّا مَسَّتِ النَّارُ  

"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.'"  

كَانَ يَضَعُ يَدَيْهِ عَلَى أُذُنَيْهِ وَيَقُولُ صُمَّتَا إِنْ لَمْ أَكُنْ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ تَوَضَّئُوا مِمَّا مَسَّتِ النَّارُ