Hadith
حَدَّثَنَا هَنَّادٌ، عَنْ عَبْدَةَ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، أَنَّ ابْنَ عُمَرَ، كَانَ يَلْبَسُ خَاتَمَهُ فِي يَدِهِ الْيُسْرَى .
Nafi' said that Ibn 'Umar used to wear his signet-ring on his left hand
Sahih · Al-Albani
Sunan Abi Dawud 4228 ·Book 36, Hadith 15·Also available on sunnah.com·