مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3559
Musnad of Abdullah bin Mas'ood
It was narrated from Abul-Kanood: I got a ring one day - and he described it. Ibn Mas'ood (رضي الله عنه) saw it on his hand and said: The Messenger of Allah (ﷺ) forbade rings of gold.
Musnad Ahmad 3582Sahees, because of corroborating evidence; this is a da'eef