من لا يحضره الفقيه, volume 1, page 163

Hadith.465 - Abdullah ibn Sinan narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) that He said: "When Adam (as) passed away and it was time to perform the prayer for him, the son of Adam, Hibatullah (Seth), said to Archangel Jibril (as): 'Advance, O’ Messenger (intermediary) of Allah (swt), and lead the prayer over the Prophet of Allah (swt).' Archangel Jibril (as) replied: 'Allah (swt), the Exalted, commanded us to prostrate to your father, and we do not go ahead of the best of his progeny. You are among the most righteous of them, so you should lead.' Hibatullah advanced and performed five takbirs over him, corresponding to the number of prayers that Allah (swt) made obligatory for the Ummah of Muhammad (peace and blessings be upon

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.466 - When the Messenger of Allah (sw) offered the funeral prayer over a deceased person, he would recite the first takbir and then recite the testimony of faith (shahada). He would then recite the second takbir, send blessings upon the Prophet and his family, and make supplications. Upon the third takbir, he would pray for the believing men and women. After the fourth takbir, he would supplicate for the deceased, And then conclude with a fifth takbir before leaving. When Allah (swt), the Exalted, forbade him from praying over the hypocrites, he recited the first takbir, recited the shahada, then recited the second takbir, sent blessings upon the Prophet and his family, recited the third takbir, and prayed for the believing men and women. Upon the fourth takbir, he did not offer any supplication for the deceased and then concluded.

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.