Muwatta Malik #53
Purity
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَلِيَّ بْنَ أَبِي طَالِبٍ، وَعَبْدَ اللَّهِ بْنَ عَبَّاسٍ، كَانَا لاَ يَتَوَضَّآنِ مِمَّا مَسَّتِ النَّارُ .
Yahya related to me from Malik that he had heard that Ali ibn Abi
Talib and Abdullah ibn Abbas did not do wudu after eating cooked food.
About Muwatta Malik
This hadith is #53 from Muwatta Malik, in the Book of Purity.