The Prophet ﷺ shaved his head during his pilgrimage.
قال و حدثنا معمر عن الزهري عن سالم
أن النبي ﷺ حلق في حجته
No references are available.
Its isnad is sahih, and it is connected through the two isnads before it from Abdul-Razzaq. Abu Dawud 2:149 also narrated it with a similar meaning through the route of Musa bin Uqba, from Nafi, from Ibn Umar. Munziri said in 1899, Bukhari and Muslim also narrated it. See also 4657.