مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2541
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that The Messenger of Allah (ﷺ) offered the funeral prayer after the person had been buried. And Wakee' said: Sufyan told us something similar.
Musnad Ahmad 2554Its isnad is saheeh, al-Bukhari (1247) and Muslim (954)]