مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2414
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) used to pray on a mat made of palm tree leaves.
Musnad Ahmad 2426Saheeh because of corroborating evidence and its isnad is da