It was narrated from Hudhaifah bin Asid that the Prophet ﷺ 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".
This hadith also teaches us about the importance of brotherhood and unity among Muslims; even though they did not know Najashi personally, they were still asked to pray for him as if he was one of their own brothers. This emphasizes how important it is to show love and care towards our fellow Muslims regardless of whether or not we know them personally.