Hadith.475 - Imam Jafar ibn Muhammad Al-Sadiq (as) said:
"If you miss the funeral prayer for the deceased until they are buried, there is no problem in performing the prayer for them after they have been buried”.
Man Lā Yaḥḍuruh al-Faqīh #451Hadith.452 - Imam Muhammad ibn Ali Al-Baqir (as) said:
"Whoever walks with a funeral procession until the funeral prayer is offered and then...
Man Lā Yaḥḍuruh al-Faqīh #475Hadith.476 - "The Messenger of Allah (sw), if he missed the funeral prayer for a deceased person, would offer the prayer at their grave”.