Muwatta Malik, Book 45, Hadith 1613 (In-Book)

Yahya related to me from Malik from a man who said, "Zayd ibn Thabit came across me while I was at al-Aswaf (on the outskirts of Madina). I had captured a hawk. He took it from my hands and set it free."

وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ رَجُلٍ، قَالَ دَخَلَ عَلَىَّ زَيْدُ بْنُ ثَابِتٍ وَأَنَا بِالأَسْوَافِ، قَدِ اصْطَدْتُ نُهَسًا فَأَخَذَهُ مِنْ يَدِي فَأَرْسَلَهُ ‏.‏

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also referenced under: Book 45, Hadith 13 (USC-MSA)