رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1706
The Book of the Prohibited actions
Prohibition of having a Hair cut or paring one's nail during the first ten days of Dhul-Hijjah for one who intends to Sacrifice an Animal
عَنْ أُمِّ سَلَمَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ : مَنْ كَانَ لَهُ ذِبْحٌ يَذْبَحُهُ، فَإِذَا أُهِلَّ هِلاَلُ ذِي الْحِجَّةِ، فَلاَ يَأْخُذَنَّ مِنْ شَعْرِهِ وَلاَ مِنْ أَظْفَارِهِ شَيْئًا حَتَّى يُضَحِّيَ ((رَوَاهُ مُسْلِم)).
Umm Salamah (May Allah be pleased with her) said: The Messenger of Allah (ﷺ) said, "When anyone of you intends to sacrifice the animal and enter in the month of Dhul-Hijjah, he should not get his hair cut or nails pared till he has offered his sacrifice." [Muslim].
Riyad as-Salihin, 1706