Al-Matalib al-'Aliyah 2287 — hadiths 2286–2303

Musaddad narrated from Mu'tamir bin Sulayman, who said: I heard my father say: "When the (first) ten days (of Dhu al-Hijjah) began, Ibn Sirin (may Allah have mercy on him) disliked that a man should cut anything of his hair, so much so that he even disliked that boys should cut or shave their hair."