كتاب الحج
15  
The Book of Pilgrimage
(56)
Chapter: The Sunnah on the day of sacrifice is to stone the Jamrah, then offer the sacrifice, then shave the head, and shaving should be started on the right side of the head
(56)
باب بَيَانِ أَنَّ السُّنَّةَ يَوْمَ النَّحْرِ أَنْ يَرْمِيَ ثُمَّ يَنْحَرَ ثُمَّ يَحْلِقَ وَالاِبْتِدَاءِ فِي الْحَلْقِ بِالْجَانِبِ الأَيْمَنِ مِنْ رَأْسِ الْمَحْلُوقِ
Sahih Muslim 1305 a

Anas b. Malik (Allah be pleased wish him) reported that Allah's Messenger (ﷺ) came to Mina; he went to the Jamra and threw pebbles at it, after which he went to his lodging in Mina, and sacrificed the animal. He then called for a barber and, turning his right side to him, let him shave him; after which he tiimed his left side. He then gave (these hair) to the people.

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ هِشَامٍ، عَنْ مُحَمَّدِ بْنِ سِيرِينَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَتَى مِنًى فَأَتَى الْجَمْرَةَ فَرَمَاهَا ثُمَّ أَتَى مَنْزِلَهُ بِمِنًى وَنَحَرَ ثُمَّ قَالَ لِلْحَلاَّقِ ‏ "‏ خُذْ ‏"‏ ‏.‏ وَأَشَارَ إِلَى جَانِبِهِ الأَيْمَنِ ثُمَّ الأَيْسَرِ ثُمَّ جَعَلَ يُعْطِيهِ النَّاسَ ‏.‏
Reference : Sahih Muslim 1305a
In-book reference : Book 15, Hadith 356
USC-MSA web (English) reference : Book 7, Hadith 2991
  (deprecated numbering scheme)