Abu Bakr bin Abu Musa Al-Ash'ari reported

I heard my father saying in the presence of the enemy: The Messenger of Allah (ﷺ) said, "The gates of Jannah are under the shades of the swords." A man with a shaggy appearance got up and said, "O Abu Musa! Did you hear the Messenger of Allah (ﷺ) say that in person?" Abu Musa replied in the affirmative; so he returned to his companions and said: "I tender you farewell greetings." Then he broke the scabbard of his sword and threw it away. He rushed towards the enemy with his sword and fought with it till he was martyred.

[Muslim].