Musnad Abu Ya'la al-Mawsili 160:58

Muhammad ibn al-Muthanna narrated to us, Ma'di narrated to us, from Ibn 'Ajlan, from his father, from Abu Hurayrah, who said: "Whoever attends a funeral and departs from it to his family, he shall have a qirat. If he accompanies it [in the procession], he shall have a qirat. If he prays over it, he shall have a qirat. And if he sits until its affairs are concluded, he shall have a qirat." The Messenger of Allah (peace and blessings of Allah be upon him) said: "The qirat with Allah is like Mount Uhud, or greater than Mount Uhud."