Musnad Ahmad 31:703

Yahya ibn Adam narrated to us, Fudayl—meaning Ibn Marzuq—narrated to us, from Atiyyah, from Abu Sa’id al-Khudri, that a man asked him about washing the head. He said: "Three handfuls, or three palms, are sufficient for you." Then he joined his hands together and said: "O Abu Sa’id, I am a man with a lot of hair." He said: "For the Messenger of Allah, may Allah bless him and grant him peace, had more hair than you, and was better."