مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3257
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) delivered a speech with his back against the Multazam (the part of the Ka'bah between the Black Stone and the door).
Musnad Ahmad 3280Its isnad is da 'eef because Abdullah bin al-Mu'ammal is da'