My maternal aunt took me to the Prophet ﷺ and said, "Messenger of Allah, my nephew has a complaint."He wiped my head and prayed for blessing for me. Then he performed ablution, and I drank from the water left over from his ablution. I stood behind him and looked at the seal of prophethood between his shoulders, which was like the Zirr of a bridal canopy.
ذهبت بي خالتي إلى النبي ﷺ فقالت: يا رسول الله! ابن أختي وقع، فمسح رأسي ودعا لي بالبركة، ثم توضأ فشربت من وضوئه، ثم قمت خلف ظهره، فنظرت إلى خاتم النبوة بين كتفيه مثل زر الحجلة.
Bukhari narrated it in the chapter on wudu (190), and Muslim in the chapter on virtues (2345), both through the route of Hatim bin Ismail, from Jad, who said, "I heard Saaib bin Yazid..." and he went on to relate the hadith. This hadith will be repeated in the chapter on the description of the Prophet ﷺ.As for his saying "waqiun" (with a kasrah on the qaf and tanwin), in Muslim's version it is "wajaun," meaning pain in the feet.As for his saying "zirr al-hijlah" (with a kasrah on the zay and a doubled ra), hijlah (with a fatha on the ha and the jim) is the singular of hijal, meaning tents decorated with cloth, bedding, and curtains, having loops and buttons. It has also been said that what is meant by hijlah here is a bird, namely the yaqub, the female of which is called hijlah. According to this, what is meant by "its button" would be "its egg." This is supported by another hadith which says, "like the egg of a pigeon." See Fath al-Bari (1/296).