It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that when the news of al-Najashi's death reached the Messenger of Allah (peace and blessings be upon him), he said: "Your brother al-Najashi has died, so offer the funeral prayer for him." So he (peace and blessings be upon him) stood, and the people, standing behind him (peace and blessings be upon him), prayed over him.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15563