Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai:4337Isḥāq b. Ibrāhīm > Muḥammad b. ʿUbayd > ʿUbaydullāh > Nāfiʿ > Ibn ʿUmar

A similar report was narrated from Ibn 'Umar, but he did not mention Khaibar,  

النسائي:٤٣٣٧أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ أَنْبَأَنَا مُحَمَّدُ بْنُ عُبَيْدٍ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ النَّبِيَّ ﷺ مِثْلَهُ وَلَمْ يَقُلْ خَيْبَرَ