Abu Hurairah (RAA) narrated that the Messenger of Allah (ﷺ) said:
"Whoever accompanies the funeral (the dead body) until he performs the funeral prayer will have a reward equal to (one Qirat), and whoever accompanies the burial procession, will be doubly awarded (two Qirat).” They then asked, ‘What is meant by the two Qirat?’ He replied (ﷺ) “Like two huge mountains.” Agreed upon. Muslim added the statement, ‘until it is buried.’

Al-Bukhari related on the authority of Abu Hurairah, “Whoever accompanies the funeral of a Muslim, seeking the reward only from Allah, the Almighty, and he stays with it until he offers the funeral prayer and the burial is completed, will return back with two Qirat, each Qirat is equal to the mount of Uhud.”