Sahih al-Bukhari, Hadith 1678 ⓘ
Narrated Ibn `Abbas: I as among those whom the Prophet sent on the night of Al-Muzdalifa early being among the weak members of his family.
حَدَّثَنَا عَلِيٌّ، حَدَّثَنَا سُفْيَانُ، قَالَ أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ أَبِي يَزِيدَ، سَمِعَ ابْنَ عَبَّاسٍ ـ رضى الله عنهما ـ يَقُولُ أَنَا مِمَّنْ، قَدَّمَ النَّبِيُّ صلى الله عليه وسلم لَيْلَةَ الْمُزْدَلِفَةِ فِي ضَعَفَةِ أَهْلِهِ.
also referenced under: Book 25, Hadith 158 (In-Book) & Volume 2, Book 26, Hadith 738 (USC-MSA)