Muwatta Malik 48
Sahih Graded by Salim al-Hilali Book of Purity · Hadith 48 of 1,858حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، . أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَكَلَ كَتِفَ شَاةٍ ثُمَّ صَلَّى وَلَمْ يَتَوَضَّأْ .
Yahya related to me from Malik from Zayd Aslam from Ata ibn Yasar from Abdullah Abbas that the Messenger of Allah, may Allah bless him and grant him peace, ate a shoulder of lamb and then prayed without doing wudu
References
Muwatta Malik 48
In-book: Book 2, Hadith 17 Source: hadith-api (fawazahmed0)