I heard the Messenger of Allah ﷺ say, "The gates of Paradise lie beneath the shade of swords."A man of shabby appearance from among the people stood up and asked, "Abu Musa, did you yourself hear this from the Messenger of Allah ﷺ?"He replied, "Yes."The man then returned to his companions and said, "I bid you peace." He broke the sheath of his sword and threw it away, then advanced with his sword and fought with it until he was killed.
حدثنا بهز حدثنا جعفر بن سليمان حدثنا أبو عمران الجوني
سمعت رسول الله ﷺ يقول إن أبواب الجنة تحت ظلال السيوف قال فقام رجل من القوم رث الهيئة فقال يا أبا موسى آنت سمعت هذا من رسول الله ﷺ قال نعم قال فرجع إلى أصحابه فقال أقرأ عليكم السلام ثم كسر جفن سيفه فألقاه ثم مشى بسيفه فضرب به حتى قتل
Its isnad is sahih. Abu Bakr bin Abu Musa is among the trustworthy narrators of the generation after the companions, and likewise is Abu Imran Jawni, Abdul-Malik bin Habib. The hadith was narrated by Muslim, 3/1511, in the chapter on leadership, on the affirmation of Paradise for the martyr. Also by Tirmidhi, 4/186, number 1659, and by Baghawi in Sharh al-Sunnah, 10/353.