Hadith 6:658
Zayd ibn al-Hubab narrated to us, from al-Qasim, who said: My father informed me that he prayed over a funeral. Jabir ibn Zayd said to him, "Step forward," and he performed the takbir over it three times.
حدثنا زيد بن الحباب عن القاسم قال أخبرني أبي أنه صلى على جنازة فقال له جابر بن زيد تقدم فكبر عليها ثلاثا