It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) said:

"When your brothers were slain at Uhud, Allah, may He be glorified and exalted, put their souls in the crops of green birds that drink from the rivers of Paradise and eat from its fruits, and they return to roost in golden lamps in the shade of the Throne. When they saw how good their drink and food are and how good the place where they stay, they said: O Lord, would that our brothers knew what Allah has done for us, so they would not lose interest in jihad or abandon fighting. Allah, may He be glorified and exalted, said: I shall convey that to them for you. And Allah, may He be glorified and exalted, revealed these verses to His Messenger: “Think not of those as dead who are killed" [Al ‘Imran 3:169].