It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever meets the enemy and stands firm until he is killed (as a martyr) or kills them (the enemies) will not be put to trial in his grave."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Abu Ayyub (may Allah be pleased with him) only with this chain; Muhammad bin Musaffa is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 8243
Hadith Takhrij«أخرجه الحاكم فى «المستدرك» برقم: 2571، وابن حجر فى «المطالب العالية» برقم: 1932، والطبراني فى «الكبير» برقم: 4094، والطبراني فى «الأوسط» برقم: 4118»