مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2123
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) entered the Ka'bah, in which there were six pillars. He stood by each pillar, but he did not pray.
Musnad Ahmad 2126Its isnad is saheeh, Muslim (1331)]