Sahih Muslim Book 4, Hadith Number 2066.

Chapter : Merit of the funeral prayer and following the bier.

Nafi’ narrated that it was said to Ibn ‘Umar that Abu Huraira reported to have heard Allah’s Messenger (may peace be upon him) as saying: He who follows the bier, for him is the reward of one qirat. Ibn ‘Umar said: Abu Huraira narrated it too often. So he sent (a messenger to) ‘Aisha to ascertain (the fact). She (‘Aisha) testified Abu Huraira. Ibn ‘Umar said: We missed so many qirats.