The Book of Funerals
21/76. Chapter:
The Numbre of Takbirs in the Funeral Prayer
Sunan an-Nasai
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ حَدَّثَنِي عَمْرُو بْنُ مُرَّةَ، عَنِ ابْنِ أَبِي لَيْلَى، أَنَّ زَيْدَ بْنَ أَرْقَمَ، صَلَّى عَلَى جَنَازَةٍ فَكَبَّرَ عَلَيْهَا خَمْسًا وَقَالَ كَبَّرَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم .
It was narrated from Abu Laila: That Zaid bin Arqam offered the funeral prayer and said the Takbir five times, and said that the Messenger of Allah had said the Takbir like this.
Reference : Sunan an-Nasa'i 1982In-book reference : Book 21, Hadith 165English translation : Vol. 3, Book 21, Hadith 1984