Musannaf Ibn Abi Shaybah

Hazrat Abdullah bin Umar (may Allah be pleased with them), Hazrat Saeed al-Maqburi, Hazrat Abu Huraira (may Allah be pleased with him), and Hazrat Abdullah state: Whoever performs the funeral prayer will have a reward of one qirat. And whoever remains until the burial will have a reward of two qirats, and a qirat is equal to the mountain of Uhud.