Hadith 29:6
Sahih (Al-Albani)
Narrated Anas ibn Malik:
The Prophet (ﷺ) had himself cupped three times in the veins at the sides of the neck and on the shoulder. Ma'mar said: I got myself cupped, and I lost my memory so much so that I was instructed Surat al-Fatihah by others in my prayer. He had himself cupped at the top of his head.
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا جَرِيرٌ، - يَعْنِي ابْنَ حَازِمٍ - حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم احْتَجَمَ ثَلاَثًا فِي الأَخْدَعَيْنِ وَالْكَاهِلِ . قَالَ مَعْمَرٌ احْتَجَمْتُ فَذَهَبَ عَقْلِي حَتَّى كُنْتُ أُلَقَّنُ فَاتِحَةَ الْكِتَابِ فِي صَلاَتِي . وَكَانَ احْتَجَمَ عَلَى هَامَتِهِ
Original Reference: Sunan Abi Dawud 3860