Hadithcore
Sunan an-Nasa'i, 5284
sahih· Darussalam

It was narrated that Anas said:

"It is as if I can see the whiteness of the Prophet's ring on his left finger."

أَخْبَرَنَا الْحُسَيْنُ بْنُ عِيسَى الْبِسْطَامِيُّ، قَالَ حَدَّثَنَا سَلْمُ بْنُ قُتَيْبَةَ، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ كَأَنِّي أَنْظُرُ إِلَى بَيَاضِ خَاتَمِ النَّبِيِّ صلى الله عليه وسلم فِي إِصْبَعِهِ الْيُسْرَى ‏.‏

References2 variants
In-Book Reference
Book 48, Hadith 245
English Reference
Vol. 6, Book 48, Hadith 5286