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 ﷺ احْتَجَمَ ثَلاَثًا فِي الأَخْدَعَيْنِ وَالْكَاهِلِ . قَالَ مَعْمَرٌ احْتَجَمْتُ فَذَهَبَ عَقْلِي حَتَّى كُنْتُ أُلَقَّنُ فَاتِحَةَ الْكِتَابِ فِي صَلاَتِي . وَكَانَ احْتَجَمَ عَلَى هَامَتِهِ .