"The Sunnah, when offering the funeral prayer, is to recite Umm Al-Qur'an) the Exxence of the Qur'an) quietly in the first Takbir, Then to say three (more) Takbir and to say the Taslim after the last one."
Sunan an-Nasa'i Book 21, Hadith 172
← Previous Hadith "I offered the funeral prayer behind Ibn 'Abbas and I heard him reciting Fatihat Al-Kitab. When he finished I took him by the hand and asked him. 'Did you recite?' He said: 'Yes, it is the truth and the Sunnah."'

Sunan an-Nasa'i Book 21, Hadith 171 Next Hadith → A similar report was narrated from Ad-Dahhak bin Qais Ad-Dimashqi.

Sunan an-Nasa'i Book 21, Hadith 173