Musnad Ahmad 1118:28

Hashim and Yunus narrated to us, they said: Al-Layth ibn Sa’d narrated to us. Hashim said: Sa’id ibn Yazid Abu Shuja’ narrated to us. And Yunus said: From Sa’id ibn Yazid Abu Shuja’ al-Himyari, from Khalid ibn Abi ‘Imran—Yunus said: al-Ma’afiri—from Hanash al-San’ani, from Fudalah ibn ‘Ubayd al-Ansari, who said: I bought a necklace on the day of the conquest of Khaybar for twelve dinars, containing gold and beads. I separated it, and I found in it more than twelve dinars. I mentioned that to the Prophet, peace and blessings of Allah be upon him, and he said: "It shall not be sold until it is separated."