Musnad Ahmad 27:203

Yahya narrated to us, from Isma'il, Salim Abu 'Abdullah narrated to me, from Ibn 'Umar, from the Messenger of Allah (may Allah bless him and grant him peace), who said: "Whoever follows a funeral procession until he prays over it, then for him is a qirat." The Messenger of Allah (may Allah bless him and grant him peace) was asked about the qirat, and he said: "Like Uhud."