Musnad Ahmad 30:2949

Yahya ibn Sa'id narrated to us, from Muhammad ibn 'Amr, who said: Abu Salamah narrated to us, from Abu Hurayrah, from the Prophet (peace and blessings of Allah be upon him), who said: "Whoever prays over a funeral, a qirat is written for him. If he follows it until its burial is completed, then he has two qirats, the smaller of which—or one of which—is like Uhud." This reached Ibn 'Umar, and he considered it immense. So he sent to 'Aishah, and she said: "Abu Hurayrah has spoken the truth." Ibn 'Umar then said: "We have certainly missed out on many qirats."