Musannaf Ibn Abi Shayba 16:914

Abu Bakr narrated to us, he said: Abu Mu'awiyah narrated to us, from al-A'mash, from Ibrahim, from Alqamah, who said: Abdullah saw a gold ring on the hand of Khabbab, so he said: "Has the time not come for this to be cast away?" He replied: "Yes, you will not see it on me after this."