(7) باب نَهْيِ مَنْ دَخَلَ عَلَيْهِ عَشْرُ ذِي الْحِجَّةِ وَهُوَ مُرِيدُ التَّضْحِيَةِ أَنْ يَأْخُذَ مِنْ شَعْرِهِ أَوْ أَظْفَارِهِ شَيْئًا
Umm Salama reported Allah's Apostle (ﷺ) as saying:
If anyone of you intends to offer sacrifice he should not get his hair cut or nails trimmed. (ES)
Reference (ES): Sahih Muslim 1977 d (ES)
In-book reference (ES): Book 35, Hadith 54 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 22, Hadith 4870 (ES)