“When the ten days (of Dhul-Hijjah) begin, and one of you wants to offer a sacrifice, let him not remove anything from his hair or skin.” (Using translation from Ibn Mājah 3149)
"إِذا دَخَلَ العشرُ وأرادَ أحدُكم أن (يُضَحِّى) فلا يَمسَّ مَن شعْرِه ولا بَشرِهِ شيئًا" .