Musannaf Ibn Abi Shayba 13:1716

Abu Bakr narrated to us, he said: Ibn Abi Za’idah narrated to us, from Yahya bin Sa’id, from Sulayman bin Yasar, from Thabit bin al-Dahhak, he said: I found a camel, so I asked Umar. He said: "Make it known (announce it)." So I made it known, but I did not find anyone who recognized it. Then I came to him and said: "It has occupied me." He said: "Release it where you found it."