Bulugh al-Maram, Book 3, Hadith 585 (English) ⓘ
‘Abdur Rahman bin Abi Laila (RAA) and ‘Zaid bin Arqam (RAA) used to recite four Takbirat when praying over the dead, but once he said it five times, so I asked him about it. He said to me, ‘The Messenger of Allah used to do so.’ Related by Muslim and the four Imams.
وَعَنْ عَبْدِ اَلرَّحْمَنِ بْنِ أَبِي لَيْلَى قَالَ: { كَانَ زَيْدُ بْنُ أَرْقَمَ يُكَبِّرُ عَلَى جَنَائِزِنَا أَرْبَعًا, وَإِنَّهُ كَبَّرَ عَلَى جَنَازَةٍ خَمْسًا, فَسَأَلْتُهُ فَقَالَ: كَانَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -يُكَبِّرُهَا } رَوَاهُ مُسْلِمٌ وَالْأَرْبَعَةُ 1. 1 - صحيح. رواه مسلم (957)، وأبو داود (3197)، والنسائي (4/72)، والترمذي (1023)، وابن ماجه (1505).
also referenced under: Book 3, Hadith 29 (In-Book)