It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever dies while guarding the frontier (ribat) in the path of Allah, Allah Almighty will keep him safe from the trial of the grave."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Safwan except Muhammad bin Himyar."
Hadith Referenceالمعجم الأوسط / باب الألف / 2349
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 7480»