"Whoever sees the new crescent of Dhul-Hijjah and wants to offer a sacrifice, let him not remove any of his hair or nails until he has offered the sacrifice." (Using translation from Nasāʾī 4361)
قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ رَأَى هِلَالَ ذِي الْحِجَّةِ فَأَرَادَ أَنْ يُضَحِّيَ فَلَا يَأْخُذْ مِنْ ظُفْرِهِ وَلَا مِنْ شَعْرِهِ حَتَّى يُضَحِّيَ»