Sunan an-Nasa'i, Volume 3, Book 24, Hadith 3036 (DarusSalam) ⓘ
It was narrated Abbas said: "I was one those whom the Prophet sent ahead on the night of Al-Muzdalifah among the weak ones of his family."
أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ كُنْتُ فِيمَنْ قَدَّمَ النَّبِيُّ صلى الله عليه وسلم لَيْلَةَ الْمُزْدَلِفَةِ فِي ضَعَفَةِ أَهْلِهِ .
also referenced under: Hadith 3033 (Reference) & Book 24, Hadith 0 (In-Book)