Hadith 510500
Chapter 24: Slaughtering Animals - كتاب الذبائح
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ، كَانَ يَقُولُ مَا فَرَى الأَوْدَاجَ فَكُلُوهُ .
Yahya related to me from Malik that Abdullah ibn Abbas used to say, "You can eat anything that has had its jugular vein cut."
Reference Muwatta Malik 510500
USC-MSA web (English) reference : Book 24, Hadith 6