Hadith 6:815
Ibn Numayr narrated to us, from Hajjaj, from ‘Adi, from Zirr ibn Hubaysh, from Ubayy ibn Ka‘b, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever prays over a funeral, for him is a qirat. And whoever follows it until it is buried, for him are two qirats." The qirat is like Uhud.
حدثنا بن نمير عن حجاج عن عدي عن زر بن حبيش عن أبي بن كعب قال قال رسول الله صلى الله عليه وسلم من صلى على جنازة فله قيراط ومن تبعها حتى تدفن فله قيراطان القيراط مثل أحد