It wasnarrated from Hudhaifah bin Asid that the Prophet (ﷺ) ledthem outand said:
"Pray for a brother of yours who has died in a landotherthan yours." They said: "Who is he?" He said: "Najashi." (TR)
English reference (TR): Vol. 1, Book 6, Hadith 1537 (TR)
Arabic reference (TR): Book 6, Hadith 1604 (TR)