مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3135
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) instructed the boys of Banu Hashim and their weak ones to move on from Muzdalifah at night.
Musnad Ahmad 3159lts isnad is saheeh, al-Bukhari (1678) and Muslim (1293)]