Musannaf Ibn Abi Shayba 21:667

Abu Usama narrated to us, from Ubayd Allah ibn Umar, from Nafi, from Ibn Umar, that he used to say during the funeral prayer: "O Allah, bless him, pray upon him, forgive him, and bring him to the cistern (hawd) of Your Messenger, may Allah bless him and grant him peace." He said: "He stood for a long time and spoke many words, of which I did not understand anything other than this."