مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3125
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that 'Abdullah bin ‘Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) prayed Zuhr in Dhul-Hulaifah, then his sacrificial animal was brought to him and he cut the right side of its hump, then he wiped the blood from it, then he garlanded it with two sandals. Then his mount was brought to him and he sat on it, and when he reached al-Baida', he entered ihram for Hajj.
Musnad Ahmad 3149Its isnad is saheeh, Muslim (1243)]