[Machine] About the prophet ﷺ , it was said to him on the day of sacrifice while he was at Mina, regarding slaughtering, shaving the head, casting stones, advancing and delaying, he said: "There is no harm."  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قِيلَ لَهُ يَوْمَ النَّحْرِ وَهُوَ بِمِنًى فِي النَّحْرِ وَالْحَلْقِ وَالرَّمْيِ وَالتَّقْدِيمِ وَالتَّأْخِيرِ فَقَالَ لَا حَرَجَ