Bayhaqi 6980 — Supplication in the funeral prayer

Shurahbil bin Sa'd said: I offered a funeral prayer with Abdullah bin Abbas (may Allah be pleased with them both) at al-Abwa'. He said takbir, then recited Umm al-Qur'an (Surah al-Fatihah) aloud, and sent blessings upon the Prophet (peace and blessings be upon him), then recited this supplication: 'Allahumma abduka wabnu abdika wabnu amatika, yashhadu an la ilaha illallahu wahdahu la sharika lahu, wa yashhadu anna Muhammadan abduka wa rasuluka, asbaha faqiran ila rahmatika, wa asbahta ghaniyyan an adhabihi, takhalla minad-dunya wa ahliha, in kana zakiyan fa-zakkihi, wa in kana mukhti'an faghfir lahu, Allahumma la tahrimna ajrahu wa la tudillana ba'dahu' (O Allah, this is Your servant, the son of Your servant and the son of Your maidservant. He bears witness that there is no god but Allah alone, without any partner, and bears witness that Muhammad is Your servant and Your Messenger. He has become in need of Your mercy, and You are free of any need to punish him. He has departed from the world and its people. If he was pure, then purify him; and if he was a wrongdoer, then forgive him. O Allah, do not deprive us of his reward, and do not lead us astray after him.) Then he said three takbirs, then gave the salam, and then said: "O people! I recited it in front of you only so that you may know that it is the Sunnah."
The Shaykh said: Regarding the supplication in the funeral prayer, many hadiths are reported from the Prophet (peace and blessings be upon him), and then from Umar, Ali, Ibn Umar (may Allah be pleased with them both) and Abu Hurayrah (may Allah be pleased with them). There is nothing fixed in the supplication, but what we have mentioned of some of them is sufficient.