Musnad Ahmad 31:230

Sulayman ibn Dawud narrated to us, Wahib narrated to us, from ‘Amr ibn Yahya al-Ansari, and Abu Salamah; Sulayman ibn Bilal narrated to us, from ‘Amr ibn Yahya, from Muhammad ibn Yusuf ibn ‘Abd Allah ibn Salam, from Abu Sa‘id al-Khudri, from the Messenger of Allah (may Allah bless him and grant him peace), who said: "Whoever comes to a funeral and walks with it from its family until it is prayed over, then for him is a qirat. And whoever waits until it is buried, or it is finished with, then for him are two qirats like Uhud."