Musnad Abu Ya'la al-Mawsili 145:8

'Umar ibn Shabbah narrated to us, Abu Bakr ibn Marwan ibn al-Hakam ibn Yazid ibn 'Umayr al-Usaydi narrated to us, 'Abd al-Warith ibn Sa'id narrated to us, from Shu'ayb ibn al-Habhab, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever prays over a funeral, a qirat is written for him. If he waits until it is finished, two qirats are written for him."