Musnad Ahmad 30:3192

Isma'il narrated to us, he said: Sa'id ibn Abi 'Arubah narrated to us, from Qatadah, from An-Nadr ibn Anas, from Bashir ibn Nahik, from Abu Hurairah, from the Prophet, peace and blessings of Allah be upon him, who said: "Whoever finds his property specifically, he is more entitled to it than the creditors."