Sunan Ibn Majah, Volume 3, Book 20, Hadith 2556 (DarusSalam) ⓘ
It was narrated from Ibn`Umar: The Prophet stoned two Jews, and I was among those who stoned them. I saw (the man) trying to shield (the woman) from the stones.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم رَجَمَ يَهُودِيَّيْنِ أَنَا فِيمَنْ رَجَمَهُمَا فَلَقَدْ رَأَيْتُهُ وَإِنَّهُ يَسْتُرُهَا مِنَ الْحِجَارَةِ .
also referenced under: Hadith 2556 (Reference) & Book 20, Hadith 2653 (In-Book)