It is liked that while shaving the head one should first shave the right half, then the left side, while facing the direction of Qiblah, uttering Allahu Akbar, and offering a two rak’ah prayer at the end of it. Waki’ said, “Abu Hanifah once told me: ‘I was mistaken concerning five rites of Hajj and a cupper taught these to me and corrected me. This happened when I went to a cupper and asked him, “How much will you charge for shaving my head?” The cupper said, “Are you from Iraq?” I said, “Yes.” The cupper said to me, “Sit down, this is a rite of Hajj, and on it no conditions must be placed.” I sat down with my face slightly away from the direction of Qiblah. At this he said, “Turn your face toward the Qiblah.” I turned the left side of my head to him to shave it first whereupon he said, “Turn over the right side of your head (that I may shave it first).” I turned the right side to him and he began shaving while I sat quiet. He again said, “Say takbir” which I did, until when I got up to leave, he said, “Where are you going?” I said, “I am going to my camp.” He said, “Offer a two rak’ah prayer first, then leave.” I asked him, “Where did you learn all this?” He replied, “I have seen ‘Ata bin Abi Rabah doing this.””‘ This was reported by Al-Muhib Al-Tabari.
Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.116A.
Section : Etiquette of Shaving or Cutting Short One’s Hair.