Sunan Ibn Majah, Book 6, Hadith 1604 (In-Book) ⓘ
It was narrated from Hudhaifah bin Asid that the Prophet led them out and said: “Pray for a brother of yours who has died in a land other than yours.” They said: “Who is he?” He said: “Najashi.”
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، عَنِ الْمُثَنَّى بْنِ سَعِيدٍ، عَنْ قَتَادَةَ، عَنْ أَبِي الطُّفَيْلِ، عَنْ حُذَيْفَةَ بْنِ أَسِيدٍ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ خَرَجَ بِهِمْ فَقَالَ " صَلُّوا عَلَى أَخٍ لَكُمْ مَاتَ بِغَيْرِ أَرْضِكُمْ " . قَالُوا مَنْ هُوَ قَالَ " النَّجَاشِيُّ " .
also referenced under: Hadith 1537 (Reference) & Volume 2, Book 6, Hadith 1537 (DarusSalam)