Urwah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) offered a funeral prayer, and he said 'faith' first and then 'Islam', and he further said these words: 'Allahumma la tahrimna ajrahu wa la tudillana ba'dahu' (O Allah, do not deprive us of his reward, nor lead us astray after him.)
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6972