Muwatta Malik 48

حَدَّثَنِي 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

Reference

Muwatta Malik 48

In-book

Book 2, Hadith 17