Sunan an-Nasa'i, Book 21, Hadith 166 (In-Book) ⓘ
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.
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 .
also referenced under: Hadith 1982 (Reference) & Volume 3, Book 21, Hadith 1984 (DarusSalam)