And Hajjaj ibn al-Sha'ir narrated to me, Yahya ibn Kathir al-'Anbari Abu Ghassan narrated to me, Shu'bah narrated to us, from Malik ibn Anas, from 'Umar ibn Muslim, from Sa'id ibn al-Musayyab, from Umm Salamah, that the Prophet, peace and blessings be upon him, said: "When you see the crescent of Dhu al-Hijjah, and one of you intends to offer a sacrifice, let him refrain from [cutting] his hair and his nails."