Muwatta Malik, Book 25, Hadith 6 (USC-MSA)

Yahya related to me from Malik that he heard Nafi say that Abdullah ibn Umar said, "Whether it eats from it or not."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَمَّنْ سَمِعَ نَافِعًا، يَقُولُ قَالَ عَبْدُ اللَّهِ بْنُ عُمَرَ وَإِنْ أَكَلَ وَإِنْ لَمْ يَأْكُلْ ‏.‏

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also referenced under: Book 25, Hadith 1059 (In-Book)