Musnad Ahmad 508:1

Yunus ibn Muhammad narrated to us, Aban—meaning Ibn Yazid al-Attar—narrated to us, from Yahya ibn Abi Kathir, from Abu Ibrahim, a sheikh from the Ansar, from his father: That the Prophet of Allah, peace and blessings of Allah be upon him, used to say when he prayed over a funeral: "O Allah, forgive our living and our dead, our elder and our young, our male and our female, and those of us who are present and those who are absent."